CN1218840C

CN1218840C - Support device for lithographic printing plate, its making method and lithographic printing original plate

Info

Publication number: CN1218840C
Application number: CN 02102072
Authority: CN
Inventors: 泽田宏和; 上杉彰男; 增田义孝; 西野温夫
Original assignee: Fujifilm Corp
Current assignee: Fujifilm Corp
Priority date: 2001-01-22
Filing date: 2002-01-21
Publication date: 2005-09-14
Anticipated expiration: 2022-01-21
Also published as: CN1367086A

Abstract

The present invention relates to a support device for lithographic printing plate, which is obtained by applying surface roughening treatment including electrochemical surface roughening treatment on an aluminum alloy plate containing 0.1-0.5 wt.% of Fe, 0.03-0.2 wt.% of Si and the balance consisting of inevitable impurities and Al while the weight ratio of Fe content to Si content is 1.5-10 and the width of crystalline grain positioned in an area to the depth of 20 um from the surface is 20-200 um while the average length of the same is 40-3000 um. Furthermore, the aluminum alloy plate comprises 0.003-0.03 wt.% of Cu, 0.001-0.04 wt.% of Ti, in such an aluminum alloy plate, a Cu content in an area to the depth of 2 um from the surface is over 20 ppn more than that in an area not less than 2 um in the depth of the same while the Cu content, Si content and Ti content are related so as to satisfy a specified relation formula: 1<=(Cu content + Si content)/Ti content<=30. The present invention also relates to lithographic printing original plate produced by the support device for lithographic printing plate.

Description

Support device for lithographic printing plate, its manufacture method and original edition of lithographic printing plate

Technical field

The present invention relates to support device for lithographic printing plate and manufacture method thereof, in more detail, relate to and adopt the asperities shape of galvanochemistry asperities processing even, chemical etching is handled and can evenly be carried out, planar (surface texture) is good, and then tests edition a support device for lithographic printing plate that property is good and a manufacture method thereof.In addition, the invention still further relates to the original edition of lithographic printing plate of making by above-mentioned support device for lithographic printing plate.

Background technology

In the past, used aluminium alloy plate as support device for lithographic printing plate.So, have and the cohesive of photographic layer and the water-retaining property of non-image part in order to make this aluminium alloy plate, carry out the asperities processing.As the method for asperities processing, known in the past have mechanical asperities methods such as ball boarding (boarding) method, brush boarding method; Use with the galvanochemistry asperities method as the electrolytic solution electrolytic polishing aluminium alloy plate surface of main body such as hydrochloric acid, nitric acid, with the chemical asperities method on acid solution etching aluminium alloy plate surface etc., in recent years, because the asperities that adopts galvanochemistry asperities method to obtain, hole (concavo-convex) is even, printing performance is good during as lithographic plate, thereby by galvanochemistry asperities method or carry out asperitiesization by combinatorial electrochemistry asperities method and other asperities method and be treated as main flow.

But in this galvanochemistry asperities processing, owing to use different aluminium alloy plates, the striated spot etc. of sharkskin shape the wrinkle inhomogeneous or so-called streak of shape (streak) that so-called face matter pit (face matter is inhomogeneous) occurs is planar bad.

In the making of common lithographic plate, test the version operation after burning epigraph, promptly confirm whether have image to come off by visual inspection, whether image etc. arranged in that unwanted part is residual, at this moment, if have uneven situation on the surface of supporter, the reduction of range estimation property is played bad influence to the correctness of testing the version operation.

In addition, owing to when printing, carry out the adjustment of dumping processing solution amount by visual inspection, if thereby uneven situation is arranged in the non-image part of supporting body surface, then the adjustment of dumping processing solution amount just is difficult to carry out, therefore in this, also must test in the version operation, remove the supporter that there is inhomogeneous situation in the surface above-mentioned.

And, in recent years, in press, adopt the image that uses bar coded galley, calculate the necessary amounts of printing ink with computing machine by the strict difference image of the image that reads part and non-image part, with the ink feeder method of supply automatically, if but there is uneven situation in the non-image part of supporting body surface, just be difficult to carry out with strict differentiate between images part of computing machine and non-image part, can not make the quantity delivered of printing ink suitable sometimes.

Therefore, wish a kind of in the processing of galvanochemistry asperities the surface can not produce planar bad support device for lithographic printing plate.

Known this planar bad be that crystalline structure with aluminium alloy plate top layer part (is the zone of number μ m or tens of μ m by surface to the degree of depth) is that cause causes, size and proterties to the composition and the crystalline structure, particularly crystal of aluminium alloy have been carried out various researchs.

For example, in the Te Kaiping 8-179496 communique, put down in writing containing Fe:0.25～0.5wt%, Si:0.03～0.1wt%, Cu:0.0054～0.04wt%, Ti:0.005～0.020wt%, and the size of the direction vertical with the rolling direction of outmost surface layer macrostructure particle is the support device for lithographic printing plate that the aluminium alloy plate of 50～200 μ m has carried out the galvanochemistry asperitiesization.

In addition, the spy opens in the clear 63-47349 communique, put down in writing and contained Mg:0.30～1.0wt%, Si:0.3～1.3wt%, Cu:0.003～0.10wt%, and the aluminium alloy plate of the mean breadth of the crystal grain of the plate width direction vertical with the surface rolling direction below 40 μ m.

But, used the supporter of the above-mentioned aluminium alloy plate that exemplifies, though can think effective to the improvement of streak, the improvement of opposite matter pit is also incomplete, in addition, has the problem of the lack of homogeneity of galvanochemistry asperities processing.

On the other hand, most before or after the processing of galvanochemistry asperities, carrying out chemical etching handles, but in order to obtain the good support device for lithographic printing plate of printing performance, not only carry out the processing of galvanochemistry asperities equably, the dissolution velocity that the etching solution of surperficial each several part is caused is even, and the meltage of each several part (etch quantity) is even.

For example, inhomogeneous when carrying out the chemical etching processing before the processing of galvanochemistry asperities if chemical etching is handled, on the surface of the support device for lithographic printing plate that obtains, produce uneven situation sometimes.How no matter the inhomogeneous spot that produces owing to this chemical etching is handled evenly carry out the processing of galvanochemistry asperities, can not complete obiteration, and therefore residual as spot in appearance at lithographic plate lithographic printing plate usefulness supporter.In addition, when carrying out the chemical etching processing after the processing of galvanochemistry asperities, if it is inhomogeneous that chemical etching is handled, even expressly evenly carry out the processing of galvanochemistry asperities, uneven situation occurs on the surface of the support device for lithographic printing plate that obtains, also have the uneven improper situation in hole that is provided with by the processing of galvanochemistry asperities simultaneously.Before the processing of galvanochemistry asperities and after when carrying out chemical etching and handling, also have same problem.

The present inventor has proposed a kind of support device for lithographic printing plate, it contains Fe:0.2～0.4wt%, Si:0.03～0.15wt%, Cu:0.006～0.03wt%, Ti:0.020～0.030wt%, and satisfy Ti/Cu:1～5, remainder is made up of unavoidable impurities and Al, the purity of Al is more than 99.3wt%, it is characterized in that, surface to sheet material comprises that the asperities processing of galvanochemistry asperities processing forms, wherein, above-mentioned sheet material is to be 30 μ m～150 μ m with being positioned at its surface to the length along the vertical plate width direction of the rolling direction of the crystal grain in the dark 5 μ m zones of thickness direction, and the length of the direction consistent with rolling direction is the sheet material (spy opens the 2000-37964 communique) of 100 μ m～3000 μ m, though the homogeneity of the asperities of this support device for lithographic printing plate galvanochemistry asperities processing and planar good, the homogeneity that chemical etching is handled is not talkative good.

In addition, put down in writing a kind of galley aluminium alloy plate in the Te Kaiping 9-279272 communique, be to contain Fe:0.20～0.6 weight %, Si:0.03～0.15 weight %, Ti:0.005～0.05 weight % and Ni:0.005～0.20 weight %, the printed panel aluminium alloy plate that remainder is made up of Al and unavoidable impurities, it is characterized in that, part or all of this element forms intermetallic compound, this intermetallic compound contains Al, and contains Fe:20～30 weight %, Si:0.3～0.8 weight % and Ni:0.3～10 weight %.

And, put down in writing a kind of aluminium alloy plate in the Te Kaiping 3-177528 communique, contained Si:0.03～0.30 weight %, Fe:0.1～0.5 weight %, Cu:0.001～0.03 weight %, Ca:0.005～0.020 weight %, Ni:0.001～0.03 weight % and Ti:0.002～0.05 weight %.

In addition, the alloy composition of aluminium alloy plate top layer part (by the zone of surface to dark number μ m) is also studied.

For example, put down in writing a kind of galley aluminium alloy plate in the Te Kaiping 10-204567 communique, be to contain Fe:0.20～0.6 weight %, Si:0.03～0.15 weight % and Ti:0.005～0.05 weight %, the galley aluminium alloy plate that remainder is made up of Al and unavoidable impurities, wherein, by high 0.01～0.17 weight % of all Si concentration of Si concentration ratio of the top layer part of surface to the 3 μ m degree of depth, this top layer part contains Si 0.05～0.2 weight %.

But, as mentioned above,,, must add effective elements such as Zn, Ni in a large number, thereby cause the cost height in order to obtain becoming the effect of purpose in the occasion that the regulation aluminium alloy is formed.

In addition, the occasion in the Si concentration that improves aluminium alloy plate top layer part is easy to occur the printing ink spot in non-image part during printing, thereby has problems aspect picture quality.

And, in the galvanochemistry asperities processing when making these support device for lithographic printing plate, according to electrolytic conditions such as supply electric weight, differences such as the size in the hole of formation, shape or distribution, thereby when actual treatment, must strictly control and manage only electrolytic condition.

The present inventor in view of such circumstances, disclosed a kind of support device for lithographic printing plate, its use contains Fe:0.05～0.5 weight %, Si:0.03～0.15 weight %, Cu:0.006～0.03 weight %, Ti:0.010～0.040 weight %, and compare the aluminium alloy plate (spy opens the 2000-108534 communique) that high 20ppm is above with the Cu content in the zone darker than this top layer part by the Cu content of the top layer part of surface to the 2 μ m degree of depth.

Above-mentioned support device for lithographic printing plate is in the processing of galvanochemistry asperities, and efficient is good, and can form and irrelevant the cheating uniformly all the time of electrolytic condition, and the printing performance during as lithographic plate is good.

But, in recent years, asperities homogeneity (homogeneitys of the size in hole, shape, the distribution etc.) level that requires further improves, and resembles the distribution at depth direction of the content of an above-mentioned support device for lithographic printing plate regulation element-specific and Cu content, and the homogeneity of asperities is insufficient sometimes.Anti-brush when in addition, also wishing as lithographic plate further improves.

In addition, in the past, the photosensitive lithographic plate master was extensive use of in hectographic printing.In recent years, utilize the method for platemaking of original edition of lithographic printing plate of laser noticeable, carried out various researchs.For example, the photon mode laser forme of the optical polymerism composition of known utilization by the visible light laser curing, or hot mode laser forme by following heat that laser radiation produces etc. to write.Adopt these modes, can directly make a plate by the numerical data of computing machine etc., very useful.The original edition of lithographic printing plate that can carry out the laser forme carries out anodized more usually by net (web) shape surface of aluminum plate is carried out the asperities processing, applies the photographic layer coating liquid then, and drying forms photographic layer and makes.Then, after netted original edition of lithographic printing plate preserved immediately or with the state on the cylinder of being wound on, be cut to the size of hope, make sheet after, pack polylith is overlapping.The original edition of lithographic printing plate that dispatches from the factory of packing adopts the image of laser explosure etc. to burn attached, video picture by the user and handles, make lithographic plate after, be installed in and supply with printing on the printing machine.

When above-mentioned original edition of lithographic printing plate was packed, the polylith original edition of lithographic printing plate that must will be cut to intended size was overlapping accurately, for this reason, must carry the original edition of lithographic printing plate that is cut to intended size accurately.In the handling process, use travelling belt usually, but on travelling belt, original edition of lithographic printing plate slides sometimes, exist to be difficult to carry accurately and overlapping problem.

In addition, in use, original edition of lithographic printing plate is in moving to various operations such as carrying out the laser image burning is attached, video picture, printing, also use travelling belt or delivery roller, on this travelling belt or delivery roller, also exist original edition of lithographic printing plate to slide the problem that is difficult to carry accurately.Particularly, in laser explosure, require very high position to determine precision, therefore carry the bad production efficiency that not only makes and reduce, also can cause the quality of the image that forms to reduce.In addition, in video picture is handled, most of developing device that uses automatic carrying formula, also strong request improvement carrying is bad in video picture.

The present inventor opens in the 2000-141932 communique the spy, following proposal has been proposed: in order to improve the carrying of lithographic plate, the surface roughness that makes reverse side lithographic plate vertically with transversely different, the ratio of the surface roughness of the direction that the surface roughness of the direction that rugosity is big and rugosity are little is 1.1～5.0, carries out the asperities processing in the reverse side scope of end below the above 50mm of 1mm at least on one side simultaneously.

But this method is on each limit of lithographic plate, if the projection that distortion causes is big, then just becomes insufficient with contacting of travelling belt etc., can not show whole effects sometimes.

And, original edition of lithographic printing plate is carried out image to be burnt attached, video picture and handles and make when being installed on the printing machine behind the lithographic plate, bend its both ends, be fixed on the drum of the plate cylinder that is called printing machine, if but crack or crackle when bending, occur, perhaps can not bend equably, can not install sometimes.

Summary of the invention

One of purpose of the present invention is to provide a kind of hole of adopting the processing of galvanochemistry asperities to obtain even, and chemical etching is handled and can evenly be carried out, and is planar good, tests edition good support device for lithographic printing plate of property.In addition, the present invention also aims to provide the stable method of making this support device for lithographic printing plate.

Another object of the present invention is to provide carrying property and all good original edition of lithographic printing plate of printing machine installation property.

The present inventor is through concentrated research, found that by making aluminium alloy plate be specific alloy composition, the mass ratio that makes Fe content and Si content is in specific scope, and the specific size that is positioned at the crystal grain of skin section, it is even to access the hole of adopting the processing of galvanochemistry asperities to obtain, and chemical etching is handled and can evenly be carried out, and is planar good, test edition good support device for lithographic printing plate of property, thereby finished support device for lithographic printing plate of the present invention.

That is to say, the invention provides a kind of support device for lithographic printing plate, it obtains by asperities processing and the chemical etching processing that aluminium alloy plate is comprised the processing of galvanochemistry asperities, wherein, above-mentioned aluminium alloy plate contains Fe 0.05～0.5 quality %, Si 0.03～0.2 quality %, remainder is made up of unavoidable impurities and Al, the mass ratio of Fe content and Si content is 1.5～10, being positioned at surface to the degree of depth is wide average out to 20～200 μ m of the crystal grain in 20 μ m zones, length average out to 40～3000 μ m.

In addition, the present inventor is through concentrated research, found that by in the aluminium alloy plate that in support device for lithographic printing plate, uses, contain Fe, Si, Cu and the Ti of specified quantitative, and make Cu content specific, and Cu content, Si content and Ti content have particular kind of relationship in the distribution of depth direction, can access the excellent in uniform that adopts the asperities that the asperities processing obtains, the degree of depth in hole is dark, the good support device for lithographic printing plate of anti-brush during as lithographic plate, thus finished the present invention.

That is to say, the present invention also provides a kind of support device for lithographic printing plate, be to containing Fe0.05～0.5 quality %, Si 0.03～0.15 quality %, the aluminium alloy plate that remainder is made up of Al and unavoidable impurities, comprise that the asperities processing of galvanochemistry asperities processing forms, it is characterized in that, in this aluminium alloy plate, also contain Cu 0.003～0.03 quality %, Ti 0.001～0.040 quality %, be that Cu content in the zone of 2 μ m manys more than the 20ppm than the Cu content in degree of depth zone more than 2 μ m by the surface to the degree of depth, and Cu content, Si content and Ti content have the relation that satisfies following formula (1).

1≤(Cu content+Si content)/Ti content≤30 (1)

Wherein, in the above-mentioned formula (1), Cu content represents that by surface to the degree of depth be Cu content in the 2 μ m zones.

Preferred a kind of mode is: above-mentioned aluminium alloy plate contains Mg 0.001～0.3 quality % again, and the element 1～100ppm that contains at least a Li of being selected from, Na, K, Rb, Cs, Ca, Sr, Ba, Sc, Y, Nb, Ta, Mo, W, Tc, Re, Ru, Os, Co, Rh, Ir, Pd, Pt, Ag, Au, C, Ge, P, As, S, Se, Te and Po, the above-mentioned support device for lithographic printing plate of the purity of the Al of above-mentioned aluminium alloy plate more than 99 quality %.

In above-mentioned support device for lithographic printing plate, to the degree of depth zone of 10 μ m preferably by the surface, between the FeSi metalloid unit area of compound exist rate below 0.5%, and exist rate below 0.5% based on the unit area of separating out product or crystallized product of Si.

The present inventor finds that support device for lithographic printing plate of the present invention can stably make by following method, the manufacturing process of the aluminium alloy plate that uses comprises DC casting, building up by welding, heat treated, hot rolling, intermediate annealing, the cold rolling and operation of proofreading and correct, and the mode that adopts continuously the carrying aluminium alloy plate to heat is simultaneously carried out this intermediate annealing, thereby has finished the manufacture method of support device for lithographic printing plate of the present invention.

That is to say, the invention provides a kind of manufacture method of support device for lithographic printing plate, be by carry out successively DC casting, building up by welding, heat treated, hot rolling, intermediate annealing, cold rolling and proofread and correct make above-mentioned aluminium alloy plate after, the asperities processing and the chemical etching that comprise the processing of galvanochemistry asperities are handled, obtain the manufacture method of the support device for lithographic printing plate of support device for lithographic printing plate of the present invention, it is characterized in that the mode that adopts continuously the carrying aluminium alloy plate to heat is simultaneously carried out this intermediate annealing.

In the manufacture method of support device for lithographic printing plate of the present invention, preferably between above-mentioned heat treated and above-mentioned hot rolling, also carry out equal thermal treatment.

In addition, in the manufacture method of support device for lithographic printing plate of the present invention, preferably between above-mentioned hot rolling and above-mentioned intermediate annealing, also carry out cold-rolling treatment.

In addition, found that of the concentrated research of present inventor above-mentioned reverse side problem in appearance can not occur if the etch quantity that makes reverse side below specified quantitative, uses the occasion of any aluminium sheet yet, and can suppress the minimizing of liquid inefficacy and aluminium plate thickness.

That is to say, the invention provides a kind of manufacture method of support device for lithographic printing plate, is the manufacture method with support device for lithographic printing plate of alkaline etching operation, and wherein, the etch quantity of reverse side is at 1.5g/m ²Below.

In addition, the present invention provides a kind of alkaline etching treating apparatus for above-mentioned manufacture method, and wherein, the etch quantity of reverse side is at 1.5g/m ²Below.

In addition, the present inventor has carried out concentrated research to the proterties of original edition of lithographic printing plate and the relation of carrying property and printing machine installation property, found that by respectively on plate rolling direction and perpendicular direction, the maximum height of the lug boss when the cut-out original edition of lithographic printing plate is made section and placed platform, number and total height control can access carrying property and printing machine all good original edition of lithographic printing plate of property is installed to particular range.

That is to say, the invention provides a kind of original edition of lithographic printing plate, be that aluminium sheet is carried out the asperities processing, emulsion applies the original edition of lithographic printing plate that obtains with drying, wherein, the length of making plate rolling direction is 600～2000mm, with plate rolling direction vertical direction wide be the rectangle section of 800～1500mm, when placing on the platform, on each limit vertical with plate rolling direction, the maximum height of lug boss is below the 2mm, the number of lug boss is below 3, the total of lug boss highly is below the 4mm, on each limit parallel with plate rolling direction, the maximum height of lug boss is below the 1.5mm, and the number of lug boss is below 3, and the total of lug boss highly is below the 3mm.By adopting said structure, the carrying of original edition of lithographic printing plate of the present invention and printing machine installation property is all good.

In order as mentioned above projection to be suppressed in the given range, the surface roughness of preferred reverse side is different on plate rolling direction and perpendicular direction, and, the surface roughness R of the direction that surface roughness is big _aBe R _Al, direction that surface roughness is little surface roughness R _aBe R _AsThe time, R _Al/ R _AsValue be 1.1～5.0.

The original edition of lithographic printing plate of this mode, reverse side has different surface roughness mutually, its R on plate rolling direction and perpendicular direction _AlWith R _AsSatisfy above-mentioned relation.The original edition of lithographic printing plate of this mode is during by the carrying of travelling belt or delivery roller, and the differentiated friction power of reverse side on plate rolling direction and perpendicular direction plays a role.Because mutual different friction force plays a role slip or swing in the time of can preventing to carry effectively between the plate rolling direction of original edition of lithographic printing plate reverse side and the perpendicular direction.

And preferably at least one carries out slight asperities processing by the end of edge to 1～50mm to reverse side.

The original edition of lithographic printing plate of this mode, have at least one end of reverse side given width carrying out the zone of asperities processing.When the original edition of lithographic printing plate of this mode was carried by travelling belt or delivery roller, the zone that reverse side has carried out the asperities processing played a role with the mutual different friction force in the zone of not carrying out the asperities processing.Big friction force by original edition of lithographic printing plate reverse side end plays a role, slip or swing in the time of can preventing to carry effectively.

The coefficient of thermal expansion of the direction vertical with the plate rolling direction after removing photographic layer is 1.0 * 10 ^-5～2.5 * 10 ^-5, the coefficient of thermal expansion of plate rolling direction is 80～98%.

After preferably making in length and breadth length and being the rectangle section of 500～1000mm, under 80～270 ℃, carry out heat treated, put cold when placing on the platform again, respectively on 4 limits, the maximum height of lug boss is below the 3mm, the number of lug boss is below 4, and the total of lug boss highly is below the 5mm.

The original edition of lithographic printing plate of this mode the distortion that causes can not occur heating when carrying out hot video picture and handle, burn heat treated such as heat (burning) processing, be difficult to occur distortion such as wrinkle when making lithographic plate.Like this, can not damage carrying, in addition, when installing on the plate cylinder of printing machine, it is bad etc. improper adaptability (fitness) also can not occur.

Remove the Sven-Gan Eriksson value preferred 2～10 behind the photographic layer.

Like this, when the bending two ends are installed on the plate cylinder of printing machine, can not cause install bad.In addition, and the original edition of lithographic printing plate of this mode adopts cutting off processing, adopt the bundle of guillotine to cut off processing, adopting the perforation processing such as perforation of module, the cut-out processing of employing shearer etc. to add man-hour of slitting shears, can not occur processing bad.

Description of drawings

Fig. 1 is a cross section mode chart of representing an example of alkaline etching treating apparatus in the past.

Fig. 2 is the side view that expression is used for the brush boarding operation notion that mechanical asperities processing of the present invention uses.

Fig. 3 is the oscillogram that expression is used for an example of the trapezoidal wave that the galvanochemistry asperities processing of use alternating current of the present invention uses.

Fig. 4 is the side view of an example of the expression setting that is used for the anode of direct current asperities of the present invention processing and catholyte treatment trough.

Fig. 5 is illustrated in to be used for the side view of an example that a groove of the present invention is provided with the electrolytic treatments groove structure of anode electrode and cathode electrode.

Fig. 6 is the side view of an example that expression is used for the radial mode groove of interchange asperities of the present invention processing.

Fig. 7 is that expression is with two side views that are used for interchange asperities processing of the present invention with an example of radial mode groove series connection setting.

Fig. 8 is the cross section mode chart of an example of expression alkaline etching treating apparatus of the present invention.

Fig. 9 is the cross section mode chart of another example of expression alkaline etching treating apparatus of the present invention.

Figure 10 is the cross section mode chart of another example of expression alkaline etching treating apparatus of the present invention.

Figure 11 is the cross section mode chart of other example of expression alkaline etching treating apparatus of the present invention.

Figure 12 is the skeleton diagram that is used for handling by spraying the treatment trough that carries out decontamination processing and washing processing.

Figure 13 is the side view by the direction observation vertical with plate rolling direction of the assay method of the lug boss of the suitable aluminium sheet that uses among expression the present invention.

Figure 14 is the cut-open view by the observation of plate rolling direction of the section shape of the suitable aluminium sheet that uses among expression the present invention.

Figure 15 is the side view of being observed by the direction vertical with plate rolling direction of assay method of the lug boss of expression original edition of lithographic printing plate of the present invention.

Figure 16 is the oblique view of an example of original edition of lithographic printing plate of the present invention.

Figure 17 is the oblique view that expression original edition of lithographic printing plate of the present invention is wound into an example of the state of cylinder shape and overlap condition.

Figure 18 is the figure of an example that the original edition of lithographic printing plate of the present invention of slight asperities processing has been carried out in the end of expression reverse side.

Figure 19 is the figure of another one example that the original edition of lithographic printing plate of the present invention of slight asperities processing has been carried out in the end of expression reverse side.Figure 19 (a) is the reverse side figure that only 1 limit parallel with plate rolling direction has been carried out the original edition of lithographic printing plate of the present invention of slight asperities processing, and Figure 19 (b) is the original edition of lithographic printing plate reverse side of the present invention of slight asperities processing has been carried out in expression to 2 limits vertical with plate rolling direction reverse side figure.

Embodiment

Below the present invention is described in detail.

Use aluminium alloy in the support device for lithographic printing plate of the present invention.Essential alloying component is Al, Fe and Si in the aluminium alloy.

Fe has the effect of the physical strength that improves aluminium alloy, if Fe content is lower than 0.05 quality %, physical strength is low excessively, when on the plate cylinder of printing machine lithographic plate being installed, causes broken version easily.In addition, when printing in a large number at a high speed, be easy to cause broken version too.Therefore, the content of Fe is more than 0.05 quality %, particularly in the occasion of the intensity of the support device for lithographic printing plate of paying attention to obtaining, more than the preferred 0.2 quality %.On the other hand, if the content of Fe is higher than 0.5 quality %, becoming needs above high strength, and when on the plate cylinder of printing machine lithographic plate being installed, it is poor to coordinate (fitness) property, causes broken version in the printing easily.In this, the content of Fe is below the 0.5 quality %, below the preferred 0.4 quality %.But,,, therefore can change above-mentioned scope a little because the restriction relevant with these intensity or harmony may not be important in the occasion of the lithographic plate that is used for the proof purposes.

Therefore, the content of Fe is 0.05～0.5 quality %.

Si is solid solution in Al, perhaps forms independent the separating out product and exist of compound between the Al-Fe-Si metalloid or Si.The Si of solid solution in Al has to be acted on the electrolysis asperities uniformly and the degree of depth based on electrolysis asperities hole is acted on uniformly.In addition, contain Si as unavoidable impurities in raw-material Al parent metal, according to occasion, the content of Si is more than 0.03 quality %.Therefore, the content that is lower than 0.03 quality % is unpractical, and is uneven in order to prevent that the starting material difference from causing in addition, in most cases adds on a small quantity wittingly.But the content of Si is lower than 0.03 quality %, and above-mentioned effect can not realize, simultaneously must highly purified Al parent metal, and cost an arm and a leg, thereby also be unpractical from this point.In this, the content of Si is more than 0.03 quality %, more than the preferred 0.06 quality %.

Otherwise if the content of Si is higher than 0.2 quality %, the ratio of the Si that exists with the form of monomer Si uprises, during printing, and the improper situation of anti-harsh ink pollution variation when having.Wherein, so-called " harsh ink pollution " is to interrupt the occasion that several times print, and is easy to adhere to printing ink at non-image surface portion of lithographic plate, and the result shows as point-like or circular spot on the paper of printing etc.In this respect, the content of Si is below 0.2 quality %, below the preferred 0.10 quality %.

Therefore, the content of Si is 0.03～0.2 quality %.

Among the present invention, the mass ratio of Fe content and Si content is necessary for 1.5～10.If in above-mentioned scope, the excellent in uniform that chemical etching is handled.The mass ratio of Fe content and Si content is more than 1.5, and is preferred more than 3, in addition, below 10, preferred below 8.

The aluminium alloy that uses among the present invention can contain following ingredients except that above-mentioned essential alloying component.

Cu is a very important element in the processing of control electrolysis asperities.In the processing of electrolysis asperities, usually indirect current flows in acidic electrolysis bath, according to the cycle that exchanges, alternately cause aluminium solubilizing reaction (the tubercular corrosion reaction, pitting) and the composition that generates of dissolving once more attached to the spot attachment reaction of solubilizing reaction portion.By carrying out this operation repeatedly, on the surface of aluminium alloy plate, there is not the concentrated tubercular corrosion reaction of carrying out at specific position, can form uniform recess (hole) all sidedly.In order to obtain good printing adaptability, the homogeneity in hole must be arranged.

If the content of Cu is lower than 0.003 quality %, the resistance of the surface oxidation tunicle when then galvanochemistry forms the hole is too small, thereby can not form uniform hole sometimes.In this, the content of Cu is more than 0.003 quality %, more than the preferred 0.005 quality %.On the other hand, if content is higher than 0.03 quality %, otherwise the resistance of the surface oxidation tunicle when forming the hole is excessive, thereby is easy to generate thick hole.In this, the content of Cu is below the 0.03 quality %, below the preferred 0.025 quality %.

In addition, as described later, in the aluminium alloy plate that uses in the support device for lithographic printing plate of the present invention, the content of Cu that by surface to the degree of depth is 2 μ m zones is different with the content of the Cu in zone more than the degree of depth is 2 μ m, and the specialized range of the content of above-mentioned Cu is to be Cu content in the 2 μ m zones by surface to the degree of depth.

In addition, among the present invention, in aluminium alloy plate, it is characterized in that, is that the Cu content in 2 μ m zones is that Cu content regional more than the 2 μ m manys more than the 20ppm than the degree of depth by surface to the degree of depth.Wherein, it is the numerical value of the Cu content in 2 μ m zones as unit representation by surface to the degree of depth that so-called " the Cu content that by surface to the degree of depth is 2 μ m zones is that the Cu content in zone more than the 2 μ m manys more than the 20ppm than the degree of depth " expression is used ppm (quality PPM), and deducting ppm is that the numerical value that obtains of the numerical value of the Cu content in zone more than the 2 μ m is more than 20 as the unit representation degree of depth.

Like this, the reaction starting point of the point-like reaction response (solubilizing reaction) that causes in the time of can making the electrolysis asperities is separated into sparse, on the other hand, also carry out the point-like reaction response, in case reaching than the degree of depth is the dark positions of 2 μ m, because this portion C u concentration is low slightly, thereby can suppress to produce excessive hole, thereby can form uniform hole.And inhibition of growing up in this hole and electrolytic condition are irrelevant.

Therefore, the content of Cu is being in the 2 μ m zones by surface to the degree of depth, be 0.003～0.03 quality % (30～300ppm), and should by surface to the degree of depth be 2 μ m zones Cu content than the degree of depth be more than the 2 μ m zone Cu content many more than the 20ppm, more than preferred many 30ppm.

In the past, in order to make the fine interpolation of the texture Ti in when casting.If the content of Ti is higher than 0.040 quality %,, thereby can not form uniform hole sometimes then owing to the resistance of surface oxidation tunicle in the processing of electrolysis asperities is too small.In this, the content of Ti is below the 0.040 quality %, below the preferred 0.030 quality %.On the other hand, if content is lower than 0.001 quality %, owing to can not make the texture when casting fine, thereby through various operations, be processed into the thickness of 0.1～0.5mm, the also residual then vestige that the thick texture when casting is arranged occurs significantly bad sometimes in appearance.In this, the content of Ti is more than the 0.001 quality %, more than the preferred 0.005 quality %, more preferably more than the 0.015 quality %.

Therefore, the content of Ti is 0.001～0.040 quality %.Ti adds as Al-Ti alloy or Al-B-Ti alloy.

And, among the present invention, it is characterized in that Cu content (quality %), Si content (quality %) and Ti content (quality %) have the relation that satisfies following formula (1).

1≤(Cu content+Si content)/Ti content≤30 (1)

Usually, Cu has makes the diameter in hole big, and makes the slick and sly effect uniformly in hole, and Si has deepens the hole, and the degree of depth in hole is acted on uniformly, and with respect to this, Ti has shoals the hole, and make the shape in hole unsetting, uneven effect.

The present inventor is contained these elements of specified quantitative to obtain this characteristic in order to make it, obtain the balance of above-mentioned opposite effect simultaneously, obtain better than the homogeneity of the previously presented support device for lithographic printing plate of present inventor (spy opens the 2000-108534 communique) asperities, the better support device for lithographic printing plate of anti-brush during as lithographic plate, discovery will remove Cu content with Ti content and select as parameter with numerical value that obtain with Si content, if this numerical value gets final product in particular range, obtain above-mentioned formula (1), thereby finished the present invention.

If the numerical value of above-mentioned parameter ((Cu content+Si content)/Ti content) is lower than 1, Keng circle will be imperfect sometimes, can not form uniform asperities.In this, above-mentioned parameter is more than 1, and is preferred more than 3.In addition, if the numerical value of above-mentioned parameter is higher than 30, form big and dark hole in a large number, the difference that the result cheats diameter becomes big, can not form uniform asperities sometimes.In this, above-mentioned parameter is below 30, and is preferred below 25.

Among the present invention, as a kind of optimal way is that aluminium alloy plate is except that above-mentioned various compositions, contain Mg 0.001～0.3 quality %, and contain element (below be called " specific trace element ") 1～100ppm of at least a Li of being selected from, Na, K, Rb, Cs, Ca, Sr, Ba, Sc, Y, Nb, Ta, Mo, W, Tc, Re, Ru, Os, Co, Rh, Ir, Pd, Pt, Ag, Au, C, Ge, P, As, S, Se, Te and Po, the purity of the Al of aluminium alloy plate is more than 99 quality %.

The effect that Mg has the fine effect of the recrystallized structure that makes Al and improves physical strengths such as pulling strengrth, yield strength, fatigue strength, bending strength, the heat-resisting property of softening.In addition, Mg has the finely dispersed effect that makes the hole in the electrolysis asperitiesization, therefore can make the asperities homogenising.

Among the present invention, be lower than the occasion of 0.001 quality % at the content of Mg, the poor dispersion in hole, anti-harsh ink pollution is poor.In this, more than the preferred 0.001 quality % of the content of Mg, more preferably more than the 0.003 quality %.In addition, be higher than the occasion of 0.3 quality % at the content of Mg, remain the poor dispersion in hole, anti-harsh ink pollution is poor.In this, below the preferred 0.3 quality % of the content of Mg, more preferably below the 0.1 quality %.

Therefore, preferred 0.001～0.3 quality % of the content of Mg.

Above-mentioned specific trace element has the inhomogeneity effect that promotes electrolytic etching in the processing of galvanochemistry asperities, improve the hole, and can show this effect with minute quantity.If it is abundant expression effect that these elements add more than the 1ppm.More than the preferred 10ppm.From the viewpoint of economy, the interpolation more than the necessary amount is undesirable, below the preferred 100ppm, more preferably below the 50ppm.Therefore, to physical characteristicss such as the physical strength that requires as support device for lithographic printing plate, flexibilities without any influence.In addition, above-mentioned addition is and their total amount during with several.

Adding method as specific trace element, when for example on fusion Al parent metal is modulated into the basis of given alloying component, casting, the method of adding as starting material, the method of adding in the treating fluid in galvanochemistry asperities treatment process, the method that adopts galvanochemistry asperities treatment process in upstream process, to add.

Be used for aluminium alloy of the present invention, more than the preferred 99 quality % of the content of Al (purity of Al), more preferably more than the 99.5 quality %.

Among the present invention, be the content of unavoidable impurities by the remainder of the above-mentioned certain content of content that all deducts Al and the above-mentioned alloying component that must have.

The physical strength of aluminium alloy depends on the purity of Al, and the purity of Al is low usually, and the flexibility of aluminium alloy is with regard to step-down.Therefore, if the content of the Al in the aluminium alloy is lower than above-mentioned scope, appear at the inappropriate situations such as installation variation on the printing machine during as lithographic plate sometimes.

Manufacture method to support device for lithographic printing plate of the present invention is specifically described below, but the manufacture method of support device for lithographic printing plate of the present invention has more than and is limited to this.

For aluminium alloy is made sheet material, for example can adopt following method.At first, the al alloy molten metal that is adjusted into given alloying component is carried out purified treatment, remove the unwanted gas and the solid impurities such as hydrogen of sneaking in the motlten metal.As the purified treatment of removing undesirable gas, for example flux (flux) is handled; Use the degassing of argon gas, chlorine etc. to handle.In addition, as the purified treatment of removing solid impurity, for example use so-called rigid media filter such as ceramic pipe filter, ceramic foam filter or with the filtration treatment as the filter of filter material or glass wool cloth (glasscloth) filter etc. such as alumina wafer, alumina balls.In addition, also can make up the purified treatment of degassing processing and filtration treatment.

Then, Birmasil motlten metal.As casting method, for example be the casting method of using stationary die of representative, drive the casting method of mold with continuous casting process as the use of representative with the DC casting.Support device for lithographic printing plate of the present invention preferably uses the aluminium alloy plate by the casting of DC casting.

In the DC casting, for example use stationary die, make the thickness of slab of wishing, for example the ingot bar of 300～800mm.According to conventional method, the ingot bar that obtains is carried out building up by welding, the cutting top layer is 1～30mm, preferred 1～10mm can access the tabular body of the aluminium alloy of wishing thickness of slab.

On the other hand, in continuous casting process, for example, can access the tabular body of the aluminium alloy of wishing thickness of slab by al alloy molten metal being inserted between a pair of biobelt.

In order to supply with hot rolling, the tabular body that obtains is heated to the temperature of hot rolling by heat treated.Preferably between heat treated and hot rolling processing, carry out in the equal thermal treatment that keeps preset time to fixed temperature.All thermal treatment is by keeping down carrying out in 1～48 hour at 450～620 ℃, makes the intermetallic compound can be not thick.Be less than 1 hour occasion, all the effect of thermal treatment is insufficient sometimes.

Then, above-mentioned tabular body is carried out hot rolling and cold rolling, finally make given thickness, for example the aluminium alloy plate of 0.1～0.5mm.The rolling of tabular body can be undertaken by interleaving into tabular body at a pair of cylinder.Preferred 350～500 ℃ of the initial temperature of hot rolling.

Cold rolling forward and backward or cold rolling in, also can carry out intermediate annealing.Intermediate annealing is preferably carried out before cold rolling or in cold rolling, more preferably carries out in cold rolling.That is to say, preferably carry out hot rolling, intermediate annealing and cold rolling operation successively, and carry out hot rolling, cold rolling, intermediate annealing and cold rolling operation successively, more preferably carry out hot rolling, cold rolling, intermediate annealing and cold rolling operation successively.

Intermediate annealing can be adopted and aluminium alloy plate made under the state of coil, use periodic annealing furnace, usually heated 2～20 hours down at 280～600 ℃, preferably 350～500 ℃ of methods that heat 2～10 hours down, perhaps use continuous annealing furnace, mode by continuous carrying aluminium alloy plate heats simultaneously heats down below 360 seconds at 400～600 ℃ usually, preferably 450～550 ℃ of methods that heat down below 120 seconds.Use continuous annealing furnace, carry the occasion that aluminium alloy plate heats simultaneously continuously,, crystalline structure is attenuated with the heating of the programming rate more than 10 ℃/second, therefore preferred as the manufacture method of support device for lithographic printing plate of the present invention.

Adopt above operation, can be in aluminium alloy plate, make that to be positioned at surface to the degree of depth be wide average out to 20～200 μ m of the crystal grain in 20 μ m zones, length average out to 40～3000 μ m.Wherein, " wide " of so-called crystal grain represented the length of crystal grain at the plate width direction vertical with aluminium alloy plate rolling direction, the length of the rolling direction of the aluminium alloy plate of " length " expression crystal grain of so-called crystal grain.

If crystal grain is roomy, in processing of galvanochemistry asperities and/or chemical etching processing, be easy to occur the disturbance in appearance of so-called streak, if the length of crystal grain is big, during processing of galvanochemistry asperities and/or chemical etching are handled, be easy to occur the disturbance in appearance of so-called face matter pit.In processing of galvanochemistry asperities and/or chemical etching processing, these obstacles occurring is owing to see crystal grain easily by these processing.

Wide average out to 20～200 μ m of crystal grain, preferred average out to 20～100 μ m.If in above-mentioned scope, be difficult to occur face matter pit.In addition, on average be lower than 20 μ m difficulties, unrealistic.

Length average out to 40～3000 μ m of crystal grain, preferred average out to 40～2500 μ m, preferred especially average out to 40～1000 μ m.If in above-mentioned scope, be difficult to occur face matter pit and streak.

Among the present invention, measure that to be positioned at surface to the degree of depth be that the method for wide and length of crystal grain in 20 μ m zones is as described below.

After on the surface of support device for lithographic printing plate or the support device for lithographic printing plate photographic layer being set, grind with the emery sand paper of #800 the lithographic plate that exposure obtains non-image part the surface to surface roughness Ra (the arithmetic mean rugosity of stipulating among the JIS B0601-1994 for example, down with.) be below the 0.2 μ m, then polish at the mill of the aluminium oxide below 3 μ m material that to be ground to surface roughness Ra be below the 0.1 μ m with particle diameter, grind material with particle diameter at the aluminium oxide below the 0.1 μ m again and polish that to be ground to surface roughness Ra be below the 0.1 μ m.Then, carry out etching, make the aluminium meltage reach thickness 1～20 μ m, thereby make the border (crystal grain edge) of crystal grain clear with the hydrofluoric acid aqueous solution of concentration 1～20 quality %.Use optical microscope to observe to it, take pictures, calculate the wide and length of crystal grain by the photo that obtains by polarizing filter.

The aluminium alloy plate that obtains uses cylinder leveller (leveller), tension force leveller means for correctings such as (tensionleveller) to proofread and correct again, can improve the planarity of aluminium alloy plate, thereby desirable.In addition, it is wide to be processed into given plate sometimes, and it is wide to be adjusted into given plate by disk cutting production line (slitter line).

Then, in order to become support device for lithographic printing plate, aluminium alloy plate is comprised the asperities processing and the chemical etching processing of the processing of galvanochemistry asperities.

Asperities processing and chemical etching are handled and also can be carried out more than 2 times respectively.The order that asperities processing and chemical etching are handled is not particularly limited.

Galvanochemistry asperities processing (processing of electrolysis asperities) also can be only carried out in the asperities processing, also can the processing of combinatorial electrochemistry asperities and mechanical asperities processing or chemical asperities processing carry out.In the occasion of processing of combinatorial electrochemistry asperities and mechanical asperities processing, preferably after mechanical asperities processing, carry out the processing of galvanochemistry asperities.The processing of galvanochemistry asperities is preferably at HNO ₃Or carry out in the HCl solution, particularly do not having and, preferably in HCl liquid, carrying out the processing of galvanochemistry asperities with the occasion of mechanical asperities processing.

According to hope, usually, mechanical asperities processing is carried out on the surface of aluminium alloy plate so that surface roughness Ra is 0.35～1.0 μ m is purpose.Among the present invention, the condition of mechanical asperities processing is not particularly limited, and can carry out according to the method for putting down in writing in the public clear 50-40047 communique of spy.The processing of machinery asperities can use the brush boarding of Bamiston (バミスト Application) suspension to handle, or carries out with copy mode.

In addition, chemical asperities processing also is not particularly limited, and can carry out according to known method.

After the processing of machinery asperities, preferably carry out following chemical etching and handle.

The chemical etching of carrying out after mechanical asperities processing is handled, for the marginal portion that makes aluminium alloy plate concave-convex surface shape mild, hang up printing ink when preventing to print, improve the stain resistance of lithographic plate, remove the unwanted material such as mill material particle of remained on surface simultaneously and carry out.Handle as chemical etching, the known etching of adopting the etching of acid and adopting alkali as particularly preferred method, for example uses the chemical etching of aqueous slkali to handle aspect etching efficiency.

The alkali that is used for aqueous slkali is not particularly limited, and for example NaOH, potassium hydroxide, sodium metasilicate, sodium carbonate, sodium aluminate, gluconic acid sodium salt are fit to.In addition, each alkali also can contain aluminium ion.

More than the preferred 0.01 quality % of the concentration of aqueous slkali, more preferably more than the 3 quality %, in addition, below the preferred 30 quality %, more preferably below the 25 quality %.

In addition, more preferably more than 30 ℃, preferred below 80 ℃ more than the preferred room temperature of the temperature of aqueous slkali, more preferably below 75 ℃.

The preferred 0.1g/m of etch quantity ²More than, more preferably 1g/m ²More than, in addition, preferred 20g/m ²Below, more preferably 10g/m ²Below.

In preferred 2 seconds～5 minutes processing time, set out more preferably 2～10 seconds by the angle of boosting productivity with respect to etch quantity.

And, after the chemical etching of using aqueous slkali after the mechanical asperities processing is handled,, preferably use the low temperature acid solution to carry out chemical etching and handle in order to remove consequent product.

The acid of using in the acid solution is not particularly limited, for example sulfuric acid, nitric acid, hydrochloric acid.

Preferred 1～50 quality % of the concentration of acid solution.

In addition, the temperature of acid solution is preferred 20～80 ℃.

As mentioned above, the asperities processing of support device for lithographic printing plate of the present invention, preferably after carrying out mechanical asperities processing, carry out the processing of galvanochemistry asperities, but the occasion of carrying out the processing of galvanochemistry asperities not carrying out mechanical asperities processing also can be used aqueous alkali such as NaOH to carry out chemical etching before carrying out the processing of galvanochemistry asperities and handle.Like this, can remove impurity that the aluminium alloy plate near surface exists etc.

Because the processing of galvanochemistry asperities makes the surface of aluminium alloy plate have fine concavo-convex (hole) easily, therefore be suitable for making the good lithographic plate of printing.The processing of galvanochemistry asperities uses direct current or alternating current to carry out in based on the aqueous solution of nitric acid or hydrochloric acid.

By the processing of galvanochemistry asperities, can generate arc crater shape or the cellular hole of about 0.5～20 μ m of mean diameter with 30～100% area occupation ratio on the surface of aluminium alloy plate.Suitably the hole of proterties has the difficult contaminative of the non-image part that improves lithographic plate and the effect of anti-brush.Among the present invention, the condition of this galvanochemistry asperities processing is not particularly limited, and can carry out under general condition.

In addition, after the processing of galvanochemistry asperities, preferably carry out following chemical etching and handle.

The surface of the aluminium alloy plate after the processing of galvanochemistry asperities exists spot and or intermetallic compound.During the chemical etching of carrying out after the processing of galvanochemistry asperities is handled,, preferably at first use aqueous slkali to carry out chemical etching and handle in order to remove spot especially effectively.Use the condition of the chemical etching processing of aqueous slkali, preferred 20～80 ℃ of treatment temperature, in addition, preferred 1～60 second of processing time.In addition, preferably contain aluminium ion in the aqueous slkali.

And, use the chemical etching of aqueous slkali to handle after the processing of galvanochemistry asperities after, in order to remove consequent product, preferably use the acid solution of low temperature to carry out chemical etching and handle.Use the condition of the chemical etching processing of acid solution, preferred 20～80 ℃ of treatment temperature, in addition, preferred 1～60 second of processing time.As acid solution, can use with the solution as main body such as nitric acid, hydrochloric acid, sulfuric acid.

In addition, even the occasion of not using the chemical etching of aqueous slkali to handle after the processing of galvanochemistry asperities in order to remove spot effectively, is preferably used acid solution to carry out chemical etching and is handled.Use the condition of the chemical etching processing of acid solution, preferred 20～80 ℃ of treatment temperature, in addition, preferred 1～60 second of processing time.As acid solution, can use with the solution as main body such as nitric acid, hydrochloric acid, sulfuric acid, wherein, preferably based on the solution of hydrochloric acid.

The chemical etching of using among the present invention is handled and can be undertaken by any method in infusion process, shower method, the cladding process, is not particularly limited.

Follow above-mentioned asperities processing and the chemical etching processing that comprises the processing of galvanochemistry asperities, preferably be used to improve the anodized of aluminium alloy plate surface abrasion resistance.As long as the electrolyte that uses in the anodized can form porous matter oxide film thereon, can be any material.Usually, can use sulfuric acid, phosphoric acid, ethane diacid, chromic acid or their potpourri.Electrolytical concentration is according to suitably decisions such as electrolytical kinds.Therefore the condition of anodized alters a great deal according to electrolytical difference, is difficult to specificly, but usually, is that 5～70 ℃, current density are 1～60A/dm as long as electrolytical concentration is 1～80 quality %, fluid temperature ², voltage is that 1～100V, electrolysis time are to get final product in 10～300 seconds.

And, in case of necessity, also can adopt the hydrophilicity-imparting treatment of silicate etc.

Describe manufacture method of the present invention below in detail.

＜aluminium sheet (aluminum) 〉

The aluminium sheet that uses among the present invention is very little spending with the metal of stable aluminium as principal ingredient, is made up of aluminum or aluminum alloy.Except that pure aluminum plate, also can use with aluminium as principal ingredient and contain the alloy sheets of micro-different element or lamination or evaporation the plastic sheeting or the paper of aluminum or aluminum alloy.And, also can use put down in writing in the special public clear 48-18327 communique on polyethylene terephthalate thin film in conjunction with the composite board of aluminium flake.

In following explanation, the above-mentioned various substrates of being made up of aluminum or aluminum alloy that exemplify are referred to as aluminium sheet and use.The different units that can contain in the above-mentioned aluminium alloy have silicon, iron, manganese, copper, magnesium, chromium, zinc, bismuth, nickel, titanium etc., and the content of different elements is below 10 quality % in the alloy.

Among the present invention, be fit to use pure aluminum plate, but because therefore the complete pure manufacturing difficulty of aluminium on refining techniques also can contain different elements on a small quantity.The composition of operable aluminium sheet is not particularly limited among the present invention like this, can suitably utilize public in the past raw material, for example aluminium alloy plates such as JISA1050, JIS A1100, JIS A3103, JIS A3005, JIS A3004, international registration alloy 3103A.Wherein, the composition of JIS A1050 and JIS A3005 is as shown in table 1.In addition, among the present invention, also can use the big aluminium alloy plates of element different such as example 1 shown in the table 1.

Table 1

	Cu(％)	Si(％)	Fe(％)	Mn(％)	Mg(％)	Zn(％)	Cr(％)	Ti(％)	Al(％)
	Cu(％)	Si(％)	Fe(％)	Mn(％)	Mg(％)	Zn(％)	Cr(％)	Ti(％)	Al(％)	JIS A1050	≤0.05	≤0.25	≤0.40	≤0.05	≤0.05	≤0.05	-	≤ 0.03	≥ 99.50
JIS A3005	≤0.30	≤0.60	≤0.70	1.0～1.5	0.20～ 0.6	≤0.25	≤ 0.10	≤ 0.10	Remainder	JIS A1050	≤0.05	≤0.25	≤0.40	≤0.05	≤0.05	≤0.05	-	≤ 0.03	≥ 99.50
JIS A3005	≤0.30	≤0.60	≤0.70	1.0～1.5	0.20～ 0.6	≤0.25	≤ 0.10	≤ 0.10	Remainder	Example 1	≤0.30	≤0.50	≤0.70	≤1.50	≤1.50	≤0.25	≤ 0.10	≤ 0.10	Remainder

In addition, the manufacture method of aluminium sheet can be any one in continuous casting mode and the DC forging type, the aluminium sheet that also can use the intermediate annealing of having omitted the DC forging type or evenly heating to handle.As described below, manufacture method according to support device for lithographic printing plate of the present invention, even the aluminium sheet that uses the aluminium sheet that obtains by the continuous casting mode or obtain by DC forging type etc., wherein omitted the material that intermediate annealing or evenly heating are handled, apparent problems such as striped or spot also do not occurred at the reverse side of the support device for lithographic printing plate that obtains.Also can use final rolling or duplicate etc. and to make it have concavo-convex aluminium sheet by lamination in rolling.In addition, the thickness of operable aluminium sheet is 0.1mm～0.6mm among the present invention.This thickness can suitably change according to the size of printing machine, the size of galley and user's hope.

The manufacture method of support device for lithographic printing plate of the present invention has carries out the operation that alkaline etching is handled to above-mentioned aluminium sheet, also can contain various operations such as asperities processing, anodized in addition, and the order of various operations is not particularly limited.Below suitable manner of the present invention is described.

＜asperities processing (graining processing) 〉

Above-mentioned aluminium sheet graining is processed into preferred shape.The method that graining is handled has the spy to open disclosed mechanical frosted in the clear 56-28893 communique (mechanical asperities processing), chemical etching, electrolysis boarding etc.And, can use in electrolysis of hydrochloric acid liquid or carry out the galvanochemistry frosted method (processing of galvanochemistry asperities, the processing of electrolysis asperities) of galvanochemistry frosted in the nitric acid electrolytic solution, with the metal plug boarding method on tinsel friction aluminium surface, with the ball boarding method on mill ball and lapping compound frosted aluminium surface, with the mechanical frosted methods such as brush boarding method of nylon bruss and lapping compound matte surface.These frosted methods can be used alone or in combination.

＜mechanical asperities processing 〉

Machinery asperities processing is for example adopted the spy to open the method for putting down in writing in flat 6-135175 communique and the special public clear 50-40047 communique to carry out.It is favourable carrying out mechanical asperities processing with the slurries of supplying with mao nylon bruss cylinder of the rotation that directly is 0.2～0.9mm and surface of aluminum plate.Also can use the spraying slurries mode, use metal plug mode, on aluminium sheet, duplicate mode with concavo-convex rolling cylinder surface shape etc.

In mechanical asperities processing, at first, before brushing boarding (graining) method,, can be used to remove the ungrease treatment of surface of aluminum plate ROLLING OIL according to hope, for example carry out the ungrease treatment of surfactant, organic solvent, alkaline aqueous solution etc.Then, use a kind or at least 2 kinds of different brushes of mao footpath, supply with the surface of aluminum plate grinding milk, brush boarding simultaneously.In the above-mentioned brush boarding, the initial brush that uses is called the 1st brush, and the brush of Shi Yonging is called the 2nd brush at last.When carrying out above-mentioned boarding, as shown in Figure 2, clamping aluminium sheet 1 is provided with cylinder shape brush 2 and 4, and two back-up rollers 5,6 and 7,8 separately.Preferred two back-up rollers 5,6 and 7,8 with each other the outside bee-line be provided with less than the mode of cylinder shape brush 2 and 4 external diameters respectively, aluminium sheet 1 is because cylinder shape brush 2 and 4 and pressurized, by at the state that is pressed between two back-up rollers 5,6 and 7,8, carry aluminium sheet with certain speed, and supply with aluminium sheet grinding milk 3, make the rotation of cylinder shape brush, lapped face.

As the brush that uses among the present invention, preferred use brush materials such as embedding nylon, polypropylene, animal wool, steel wire in the bottom of cylinder shape and have even staple length and the brush of flocking distribution, open aperture in the bottom and embed the brush of bristle tuft, groove (channel) cylinder type brush etc.

Wherein, preferable material is a nylon, and the staple length after the preferred flocking is 10～20mm.Preferred hair footpath is 0.24～0.83mm, more preferably 0.295～0.6mm.The cross sectional shape circular of hair.If the hair footpath is less than 0.24mm, the dirty degradation in shade (shadow) portion if surpass 0.83mm, covers the dirty variation of (blanket) main body sometimes sometimes.The preferred nylon of material of hair be fit to use nylon 6, nylon 66, NYLON610 etc., aspects such as the dimensional stability that causes in pulling strengrth, mar proof, suction, bending strength, thermotolerance, recovery, most preferably NYLON610.

Preferred 1～10 of the number of brush, more preferably 1～6.The brush cylinder can leave as described in the flat 6-135175 communique as the spy, the different brush cylinder in combination hair footpath.Back-up roller can use has rubber or metal covering, can fully keep linear structure.The sense of rotation of brush cylinder, preferably clockwise as shown in Figure 2 with respect to the throughput direction of aluminium sheet, but be a plurality of occasions at the brush cylinder, also can make a part of brush cylinder counter-rotating.

The lapping compound that uses among the present invention can use known material.For example can use lapping compounds such as パミスト Application, silica sand, aluminium hydroxide, alumina powder, volcanic debris, emery, or their potpourri.Wherein, preferred mean grain size is 5～150 μ m, and proportion is 1.05～1.3 lapping compound.

＜galvanochemistry asperities processing 〉

The processing of galvanochemistry asperities with obtain with not overlapping size evenly, be evenly distributed concavo-convex be purpose, in based on the aqueous solution of hydrochloric acid or nitric acid, carry out with interchange or direct current.

Can use based on the aqueous solution of hydrochloric acid to be generally used for the material carry out the processing of galvanochemistry asperities with exchanging, can be in the aqueous hydrochloric acid solution of 1～100g/L with greater than 1g/L and add the chloride that aluminum chloride, sodium chloride, ammonium chloride, sodium hypochlorite etc. contain chlorion less than saturated amount and use.In addition, the metal also can dissolved iron in the aqueous solution of hydrochloric acid, contain in the aluminium alloy such as copper, manganese, nickel, titanium, magnesium, silicon.Preferred 20～50 ℃ of temperature, more preferably 30～40 ℃.

Trapezoidal wave as an example of the interchange of using in the galvanochemistry asperities of the present invention processing can exemplify structure shown in Figure 3.Electric current is by 0 to the time that reaches peak value (TP) preferred 0.5～2msec.If shorter, be easy to that the tremble processing of line of what is called vertically to occur inhomogeneous with the aluminium sheet working direction than 0.5msec.If TP is longer than 2msec, by the electrolytic solution that is used for the processing of galvanochemistry asperities be electrolytic treatments in the nitric acid liquid of representative with ammonium ion etc., be easy to be subjected to the influence of the micro constitutent that nature increases, thereby be difficult to carry out uniform asperities processing.The trend that the result has dirty performance to reduce.The DUTY ratio that trapezoidal wave exchanges can use 1: 2 to 2: 1, opened as described in the flat 5-195300 communique as the spy, aluminium was not being used in the indirect power supply mode of conductive drum, and preferred DUTY ratio is 1: 1.Preferred 50～the 150Hz of frequency that trapezoidal wave exchanges, more preferably 60～120Hz.

This electrolysis asperities processing also can be to use the spy to open the galvanochemistry asperities processing of the direct current of putting down in writing in the flat 1-141094 communique.The processing of direct current asperities uses DC voltage to carry out the processing of galvanochemistry asperities in acidic aqueous solution.Carry out the processing of galvanochemistry asperities in order in acidic aqueous solution, to use DC voltage, in electrolytic tank, fill acidic aqueous solution, in this acidic aqueous solution, be arranged alternately anode and negative electrode, impressed DC voltage between these anodes and negative electrode keeps arbitrary interval simultaneously and makes aluminium sheet by carrying out between anode and negative electrode.

Acidic aqueous solution can use common with the material that uses in the galvanochemistry asperities processing that exchanges, for example based on the aqueous solution of hydrochloric acid, nitric acid etc.Wherein, preferably based on the aqueous solution of nitric acid.Based on the occasion of the aqueous solution of nitric acid, can use aluminium nitrate, sodium nitrate, ammonium nitrate etc. to contain the nitrate compound of nitrate ion.In addition, preferably with the amount aluminum mixture salt of 1～150g/L, ammonium salt etc. more than a kind.In addition, ammonium ion also increases naturally by carry out electrolytic treatments in aqueous solution of nitric acid.The metal of in addition, also can dissolved iron in acidic aqueous solution, containing in the aluminium alloy such as copper, manganese, nickel, titanium, magnesium, silicon dioxide.And, also can add ammonium ion, nitrate ion.

The concentration of acidic aqueous solution is preferably greater than 1.0g/L and less than the concentration of saturation concentration, more preferably 5～100g/L.If concentration is lower than 1.0g/L, the electric conductivity variation of liquid, decomposition voltage rises sometimes.If concentration surpasses 100g/L, going wrong aspect the corrosion resistance of equipment sometimes.In addition, preferred 30～55 ℃ of the temperature of acidic aqueous solution, more preferably 35～50 ℃.If temperature is lower than 30 ℃, the electric conductivity variation of liquid, decomposition voltage rises sometimes.If temperature is higher than 55 ℃, going wrong aspect the corrosion resistance of equipment sometimes.

Negative electrode for example can use platinum, stainless steel, carbon, titanium, tantalum, niobium, zirconium, hafnium or their alloy.Occasion as negative electrode use titanium by in its surface coverage platinum metals, can become the negative electrode with corrosion resistance in 30～60 minutes 400～1000 ℃ of following thermal treatments then.In order to prevent the rising of the decomposition voltage that separating out of oxyhydroxide causes, the approximate as much as possible minute surface in the surface of preferred negative electrode.

So-called DC voltage among the present invention, continuous DC voltage that yes is with the voltage of rectification commercial ac powers such as diode, transistor, controllable silicon, GTO or rect.p. direct current etc., is the voltage that does not have change in polarity fully to the definition of general direct current.Particularly preferred pulsation rate is less than 10% continuous DC voltage.Preferred 20～the 200A/dm of current density ², more preferably 50～120A/dm ²Be added in the preferred 10～1000C/dm of electric weight on the aluminium sheet in the processing of galvanochemistry asperities ², more preferably 40～600C/dm ²

Use DC voltage to carry out in the processing of galvanochemistry asperities, anode and negative electrode can constitute with parts respectively, also can make up a plurality of electrode slices and constitute.Owing to can simply and at an easy rate make, and can make distribution of current equably, so a plurality of electrode slices of preferred compositions constitute.Make up the occasion that a plurality of electrode slices are made, for example with given spaced and parallel a plurality of electrode slices are set, or a plurality of electrode slices are set abreast by the insulator of 1～5mm.The shape of kind electrode sheet is not particularly limited, and can be the square bar shape, also can be round bar shape.In addition,, preferably have both electrical insulating property and chemical sproof material, use vinyl chloride, rubber, teflon, FRP etc. as insulator.The length of anode and negative electrode (L) preferably when the passing through speed and be V (m/sec) of aluminium sheet, is 0.05V～5V (m) respectively.

Anode can use on spherical metals such as titanium, tantalum, niobium electroplate or covering the electrode or the ferrite electrode of platinum family electrodes such as platinum.The ferrite electrode is owing to make long electrodes sized difficulty, thereby butt joint of the electrode more than 2 or stack can be connected, but, the junction surface handles uneven generation reason owing to becoming, therefore along the working direction zigzag of aluminium sheet the position of electrode engagement portion is set, make it with respect to working direction, do not overlap in same position in vertical direction.Preferred 10～the 50mm of distance between anode and the aluminium sheet, more preferably 15～30mm.

Use the device that uses in the galvanochemistry asperities processing of direct current, use the anode and the negative electrode that alternately are provided with more than a pair of in acidic aqueous solution, making aluminium sheet is favourable by the asperities mode on it.

The device that uses in the galvanochemistry asperities processing with description of drawings use DC voltage of the present invention.

In the asperities treating apparatus of the use DC voltage that Fig. 4 represents, the electrolytic tank of the anode electrolysis processing of carrying out aluminium sheet at first is set at first, the electrolytic tank of the catholyte processing of carrying out aluminium sheet then is set.In the device that Fig. 5 represents, in an electrolytic tank, be provided with respectively and carry out aluminium sheet catholyte anode of handling and the negative electrode that carries out the aluminium sheet anodizing.

Below, the device that uses in the galvanochemistry asperities processing with description of drawings use alternating voltage of the present invention.

Among the present invention, when using the galvanochemistry asperities processing of interchange, preferred radial mode device as shown in Figure 6.In Fig. 6,11 is aluminium sheet, and 12 for supporting the radially drum of aluminium sheet.It is certain that aluminium sheet keeps, and moves in auxiliary electrode 18 such as main pole 13a, the 13b of carbon system and the ferrite that is provided with for the carbon dissolution that prevents main pole, platinum and gap.The degree that the gap is generally 3～50mm is suitable.Central electrode is different owing to the electrolytic condition of obtaining with the length ratio of treated length ratio, main pole 13a and the 13b of auxiliary electrode.The length ratio of main pole 13a and 13b can be selected in 1: 2 to 2: 1 scope, and preferably making it as much as possible becomes 1: 1.The treated length of main pole 13a or 13b and impressed current anode 18 was than preferred 1: 1 to 1: 0.1.In addition, handle inhomogeneous in order to suppress to be called the tremble striation that vertically produces with the aluminium sheet working direction of line, preferably, carry out the soft start district shown in Figure 7 (soft start zone) that low current density is handled in the beginning setting of 13a, 13b electrode as described in the public clear 63-16000 communique of spy.Because main pole 13 radially drum 12 becomes R (bending) difficulty, therefore to open as described in the flat 5-195300 communique as the spy, convention is to accompany insulator that the thickness that is called insulator is 1～5mm and side by side.

Any current value from power supply is controlled, split into to the electric current that flows into auxiliary electrode by 19 rectifier cell or on-off element.Rectifier cell as 19, preferred semiconductor on-off

element

19a, 19b can control the electric current that flows into impressed current anode 18 by enough build-up of luminance phase angles.By partial current in impressed current anode, can suppress the dissolving of main pole carbon electrode, the asperities shape in the control galvanochemistry asperities chemical industry preface.Preferred 0.95: 0.05 to 0.7: 0.3 of the current ratio of the electric current of the electric current of inflow carbon electrode and inflow impressed current anode.

Liquid stream can be parallel with advancing of aluminium sheet, also can be relative, and it is few to take place to handle uneven situation in the time of relatively.Electrolytic treatments liquid 14 enters in the electrolyte supply mouth 15, enters cavity through divider, makes it to be evenly distributed on whole cross directions of drum 12 radially, by being ejected in the electrolyte path 17 by slit 16.Electrolysis unit that also can 2 above Fig. 6 arranged side by side as shown in Figure 7 uses.

＜alkaline etching is handled 〉

The aluminium sheet handled of frosted carries out chemical etching with alkali like this.

It is that ROLLING OIL, spot, autoxidation tunicle to remove above-mentioned aluminium sheet (aluminum) surface is purpose that alkaline etching is handled, in addition, to dissolve the concavo-convex marginal portion that generates owing to above-mentioned mechanical asperitiesization, the surface that obtains having level and smooth fluctuating is a purpose, in addition, to remove the dirt composition that generates in the processing of above-mentioned galvanochemistry asperities rapidly is purpose, and being controlled to be 0.3～1.0 μ m with the mean diameter with the asperities groove is that purpose is carried out.

The detailed description of handling for alkaline etching such as the 3rd, 834, No. 398 instructionss of United States Patent (USP) etc. are described.As the alkali that in aqueous alkali, uses, open as described in the clear 57-16918 communique as the spy, NaOH, potassium hydroxide, sodium phosphate, sodium aluminate, sodium carbonate etc. are arranged, can be used alone or in combination them.Preferred 5～30 quality % of the concentration of aqueous alkali, preferred especially 20～30 quality %.Preferred 0.5～30 quality % of the concentration of the aluminium that in aqueous alkali, dissolves.Etching by aqueous alkali was preferably handled 1～120 second under fluid temperature is 40～90 ℃.Preferred 1～the 30g/m of etch quantity (meltage of the aluminium by etch processes) ², more preferably 1.5～20g/m ²

Alkaline etching is handled and is not limited to a kind of method, can make up a plurality of operations.Particularly for example after carrying out mechanical asperities processing, carry out galvanochemistry asperities processing etc. and repeatedly carry out the occasion of asperities processing, preferably respectively after the asperities processing, carry out alkaline etching and handle.

Among the present invention, in above-mentioned alkaline etching operation, it is characterized in that the etch quantity of reverse side is at 1.5g/m ²Below.If the etch quantity of reverse side is at 1.5g/m ²Below, even the aluminium sheet that uses the aluminium sheet that obtains by the continuous casting mode or obtain by DC forging type etc., wherein omitted the structure that intermediate annealing and evenly heating are handled, above-mentioned reverse side problem in appearance can not appear yet, the liquid failure degree of etching solution is little, and the minimizing of aluminium plate thickness is also little.The preferred 1.0g/m of the etch quantity of reverse side ²Below, more preferably 0.5g/m ²Below.

Among the present invention,, make to add up to etch quantity in above-mentioned scope in the occasion of repeatedly carrying out the alkaline etching operation.

The method of etch quantity in above-mentioned scope of reverse side is not particularly limited, for example uses the method for alkaline etching treating apparatus of the present invention.

Alkaline etching treating apparatus of the present invention is to make the etch quantity of reverse side at 1.5g/m ²Following alkaline etching treating apparatus.Use accompanying drawing to specify alkaline etching treating apparatus of the present invention below, but the present invention have more than and is limited to this.

The alkaline etching treating apparatus of representing in the mode chart of Fig. 8 and Fig. 9 of the present invention all is the alkaline etching treating apparatus that are provided with sprayer and coating member, wherein, above-mentioned sprayer is the sprayer that scatters aqueous alkali on a face of the metal web (web) of continuous supply, above-mentioned coating member is in the inside part of this metal web part of having been scattered this aqueous alkali, covers the coating member at these metal web two ends at least.

In the alkaline etching treating apparatus 110 of Fig. 8, scatter aqueous alkali to the surface of aluminium sheet 1 with sprayer 111.On the other hand, the reverse side of aluminium sheet 1 is with 112 to cover with covering of coating member, and the aqueous alkali that intersperses among the surface can not spread in fact.

Cover with 112 and preferably cover, but as long as cover the two ends of aluminium sheet 1 at least across the overall withs of aluminium sheet 1.

In addition, among Fig. 8, cover with 112 and cover across the total length of being scattered the inside part of part by aqueous alkali, if but the etch quantity that can make reverse side at 1.5g/m ²Below, also can in the part of upstream or the part in downstream etc., there be the part that does not have covering.

In addition, cover with 112 also cover aluminium sheet 1 scattered the upstream portion and/or the downstream part of part by aqueous alkali, and preferably can prevent the aqueous alkali that disperses by sprayer 111 or scatter after the aqueous alkali that spreads cause etching.

The alkaline etching of Fig. 9 is handled in the treating apparatus 120, scatters aqueous alkali with sprayer 121 on the surface of aluminium sheet 1.On the other hand, the reverse side of aluminium sheet 1 covers with the cylinder 122 that covers of coating member, and the aqueous alkali that intersperses among the surface can not spread in fact.

Cover cylinder 122 and preferably cover, but as long as cover the two ends of aluminium sheet 1 at least across the overall with of aluminium sheet 1.

In addition, among Fig. 9, cover cylinder 122 and cover across the total length of being scattered the inside part of part by aqueous alkali, if but the etch quantity that can make reverse side at 1.5g/m ²Below, also can in the part in the part of upstream or downstream, there be the part that not have covering.

In addition, cover the upstream portion and/or the downstream part of being scattered part by aqueous alkali that cylinder 122 also covers aluminium sheet 1, at the aqueous alkali that can prevent to disperse by sprayer 121 or the aqueous alkali that spreads after scattering cause etched aspect ideal.

The alkaline etching treating apparatus of representing in the mode chart of Figure 10 of the present invention is the alkaline etching treating apparatus that the part except that the two ends of a face of the metal web of supplying with continuously contacts with aqueous alkali.

In the alkaline etching treating apparatus 130 of Figure 10, supply with aluminium sheet 1, the aqueous alkali of filling in surface and the groove 131 is contacted with the downward state in surface.The width setup of groove 131 is the width that is slightly less than aluminium sheet 1, the state setting of the two ends of aluminium sheet 1 to expose in groove 131.Aqueous alkali contacts with part except that aluminium sheet 1 surperficial two ends, makes it diffusion by " wetting ", thereby carry out etching between both ends, on the other hand, is difficult to cause spreading of aqueous alkali.

The length of groove 131 suitably determines according to the etch quantity on surface.

In addition, not shown, supply with aluminium sheet with the state that the surface makes progress, supply with the aqueous alkali of necessary amount by the part of last side direction except that the aluminium sheet two ends, make it diffusion by " wetting ", perhaps with formation such as squeegees, thereby the alkaline etching treating apparatus of supplying with aqueous alkali between both ends also is a suitable example of the present invention.

The alkaline etching treating apparatus of representing in the mode chart of Figure 11 of the present invention is to be provided with the sprayer that scatters aqueous alkali on a face of the metal web of continuous supply, and to the distribution of this metal web in the inside part of part of this aqueous alkali, scatter the alkaline etching treating apparatus of the sprayer of water at least to these metal web two ends.

In the alkaline etching treating apparatus 140 of Figure 11, scatter aqueous alkali to the surface of aluminium sheet 1 with sprayer 141.On the other hand, wash sprayer 142 with water and scatter water, the aqueous alkali that intersperses among the surface can not spread in fact to the reverse side of aluminium sheet 1.

Washing sprayer 142 preferably scatters water across the overall with of aluminium sheet 1, but as long as scatters water to the two ends of aluminium sheet 1 at least.

In addition, among Figure 11, washing sprayer 142 scatters water across the total length of the inside part that is scattered part by aqueous alkali, if but the etch quantity that can make reverse side at 1.5g/m ²Below, also can be in the part of upstream or the part in downstream etc. existence do not scatter the part of water.

Electrolytic polishing in the＜acidic aqueous solution is handled and etch processes 〉

Among the present invention, except that above-mentioned alkaline etching is handled, can carry out also that electrolytic polishing in the acidic aqueous solution is handled or acidic aqueous solution in chemical etching handle.

These processing are to be purpose with ROLLING OIL, spot, the autoxidation tunicle of removing above-mentioned aluminium sheet (aluminum) surface, in addition, to dissolve the concavo-convex marginal portion that generates owing to above-mentioned mechanical asperitiesization, the surface that obtains having level and smooth fluctuating is a purpose, and, be that purpose is carried out to remove the dirt composition that generates in the processing of above-mentioned galvanochemistry asperities rapidly.

Handle about the electrolytic polishing in the acidic aqueous solution, for example between palace Fuji hero: clean design, No.21, p.65-72 electrolytic polishing of record is handled prescription example beyond material in (1984).Among the present invention, can use the aqueous solution of using in the known electrolytic polishing processing.Preferably based on the aqueous solution of sulfuric acid or phosphoric acid, more preferably based on the aqueous solution of phosphoric acid.

The appropraite condition that electrolytic polishing is handled is phosphoric acid concentration 20～90 quality % (preferred 40～80 quality %), 10～90 ℃ of fluid temperatures (preferred 50～80 ℃), current density 1～100A/dm ²(preferred 5～80A/dm ²), electrolysis time 1～180 second.In phosphate aqueous solution, can add sulfuric acid, chromic acid, hydrogen peroxide, citric acid, boric acid, hydrofluorite, phthalic anhydride of 1～50 quality % etc.In addition, aluminium certainly contains the alloying component that contains in the aluminium alloy of 0～10 quality %.Electric current can use direct current, pulse direct current or interchange, preferred direct current continuously.

Electrolytic processing apparatus can use the technology of using in the known electrolytic processing such as plane groove, radial mode groove.The flow direction can be any with respect in aluminium sheet following current and the adverse current, the preferred 0.01～10000cm/min of flow velocity.Preferred 0.3～the 10cm of aluminium sheet and distance between electrodes, more preferably 0.8～2cm.Method of supplying power to can use the direct feeding system with lead, also can use the indirect power supply mode (liquid power supply mode) without lead.Electrode material and the structure used can be used the known technology that uses in the electrolytic treatments, but the preferred carbon of cathode material, in addition, the preferred ferrite of anode material, yttrium oxide or platinum.

About the detailed description of the etch processes in the acidic aqueous solution, as United States Patent (USP) the 3rd, 834, No. 398 instructionss etc. are described.As the acid of using in the acidic aqueous solution, open as described in the clear 57-16918 communique as the spy, fluoric acid is arranged, fluoridize zirconic acid, phosphoric acid, sulfuric acid, hydrochloric acid, nitric acid etc., can be used alone or in combination them.Preferred 0.5～25 quality % of the concentration of acidic aqueous solution, preferred especially 1～5 quality %.Preferred 0.5～5 quality % of the aluminium that dissolves in the acidic aqueous solution.The etching that acidic aqueous solution causes preferably is 40～90 ℃ at fluid temperature and handled 1～120 second down.Preferred 1～the 30g/m of etch quantity ², more preferably 1.5～20g/m ²

＜decontamination is handled 〉

Usually, owing to alkaline etching is handled in surface of aluminum plate generation spot, therefore preferably carry out the decontamination processing this moment with the acid mixture that contains phosphoric acid, nitric acid, sulfuric acid, hydrochloric acid, chromic acid or the acid more than 2 kinds in them.Preferred 1～30 second of decontamination time.Fluid temperature is to carry out under the normal temperature to 70 ℃.

Repeatedly carry out the occasion that alkaline etching is handled, preferably after carrying out the alkaline etching processing respectively, carry out decontamination and handle.

＜anodized 〉

And, in order to improve the water-retaining property and the mar proof on surface, carry out anodized.

The electrolyte that uses in the anodized as aluminium sheet, if form porous matter oxide film thereon, whatsoever material all can use, and usually uses sulfuric acid, phosphoric acid, oxalic acid, chromic acid or their acid mixture.These electrolytical concentration can suitably determine according to electrolytical kind.Anodised treatment conditions are because the electrolyte that uses carries out various variations, thereby cannot treat different things as the same, but usually, as long as electrolytical concentration is in the scope of 1～80 quality % solution, fluid temperature is 5～70 ℃ scope, and current density is at 1～60A/dm ²Scope, voltage is in the scope of 1～100V, electrolysis time promptly is fit to 10 seconds～5 minutes scope.

Sulfuric acid process is handled with DC current usually, but also can be with exchanging.The concentration of sulfuric acid is used with 5～30 quality %, 5～250 seconds of electrolytic treatments under 20～60 ℃ temperature.Contain aluminium ion in preferred this electrolytic solution.And, the preferred 1～20A/dm of current density of this moment ²

The occasion of phosphoric acid method is preferably with the concentration of 5～50 quality %, 30～60 ℃ temperature, 10～300 seconds, 1～15A/dm ²Current density handle.

The preferred 1.0g/m of the amount of anodic oxidation coating ²More than, more preferably 2.0～6.0g/m ²If the amount of anodic oxidation coating is less than 1.0g/m ², then anti-brush is insufficient, is easy to damage the non-image part of lithographic plate simultaneously, is easy to occur having in damaged portion the what is called " hinder dirty " of printing ink during printing.

＜hydrophilicity-imparting treatment 〉

After carrying out anodized, hydrophilicity-imparting treatment is carried out on the aluminium surface in case of necessity.

As hydrophilicity-imparting treatment of the present invention, United States Patent (USP) the 2nd is for example arranged, 714, No. 066 instructions, the 3rd, 181, No. 461 instructionss of United States Patent (USP), United States Patent (USP) the 3rd, 280, disclosed alkali silicate (for example sodium silicate aqueous solution) method in No. 734 instructionss and the 3rd, 902, No. 734 instructionss of United States Patent (USP).In this method, supporter floods in sodium silicate aqueous solution and is processed, perhaps by electrolytic treatments.In addition, also can use in the special public clear 36-22063 communique disclosed usefulness to fluoridize potassium zirconium, perhaps United States Patent (USP) the 3rd, 276, No. 868 instructionss, the 4th, 153, No. 461 instructionss of United States Patent (USP) and United States Patent (USP)s the 4th, the disclosed method of handling with polyvinylphosphonic acid etc. in 689, No. 272 instructionss.In addition, after processing of galvanochemistry asperities and anodized, also can carry out sealing of hole and handle.Described sealing of hole is handled by impregnated in hot water and is carried out with hydrothermal solution that contains inorganic salts or organic salt and water vapor bath etc.

In addition, the electrolytic polishing processing in the acidic aqueous solution of the invention described above, etch processes, decontamination in the acidic aqueous solution are handled, are washed the device that uses in processing and the hydrophilicity-imparting treatment and also can flood, and in addition, also can for example be sprayers shown in Figure 12.

In addition, aluminium sheet by the invention described above galvanochemistry asperities treatment trough, chemical etching groove, decontamination treatment trough, washing treatment trough and hydrophiling groove can carry out various processing at the cross direction of aluminium sheet equably by carrying out the mangle that roll (niproll) causes.

As mentioned above, can access support device for lithographic printing plate of the present invention.The asperities excellent in uniform that support device for lithographic printing plate of the present invention obtains by the asperities processing, the degree of depth in hole is dark, and the anti-brush during as lithographic plate is good.

In the above-mentioned support device for lithographic printing plate, be in the 10 μ m zones preferably by surface to the degree of depth, to have rate be below 0.5% to the unit area of compound between the FeSi metalloid, and to have rate based on the unit area of separating out product or crystallized product of Si be below 0.5%.

As mentioned above, Si is solid solution in Al, perhaps forms between the Al-Fe-Si metalloid compound or the independent precipitate of Si and exists.If heat aluminium alloy plate in the manufacture process of support device for lithographic printing plate, the Si of solid solution separates out as monomer Si.Compound gives ill effect to anti-harsh ink pollution between known monomers Si and FeSi metalloid.

In the suitable method of the present invention, by surface to the degree of depth is in the 10 μ m zones, to have rate be below 0.5% to the unit area of compound between the FeSi metalloid, and to have rate based on the unit area of separating out product or crystallized product of Si be below 0.5%, and therefore anti-harsh ink pollution is good.

Wherein, " there is rate in the unit area of compound between the FeSi metalloid " and " there is rate in the unit area of separating out product or crystallized product based on Si " for example can obtain by electronic checkout microanalysis (EPMA).EMPA is the analytical approach that has or not and exist rate of measuring element-specific by the characteristic X-ray that the position by the irradiation electron ray produces.In addition, usually electron ray arrives inner degree of depth difference according to the numerical value of accelerating potential by the surface, thus among the present invention by using the accelerating potential of 10～40kV, can measure by surface to the degree of depth is the rate that exists of the Fe in 10 μ m zones and Si.

At first, obtain the Fe that exists in the given area on support device for lithographic printing plate surface and location and the area of Si by EPMA with surface analysis.Then, planimeter is calculated Fe and Si divides other to have the rate that exists of rate and Fe and Si intersection by measuring.And, deduct the rate that exists of Fe and Si intersection by the rate that exists of Si, calculate the rate of having to the part of Si that exists.

Wherein, Fe and Si superposed part are equivalent to compound between the FeSi metalloid, and that has only the part of Si to be equivalent to Si to be principal ingredient separates out product or crystallized product.

Therefore, Fe that aforementioned calculation goes out and Si intersection to exist rate to be equivalent to by surface to the degree of depth be " there is rate in the unit area of compound between the FeSi metalloid " in the 10 μ m zones, aforementioned calculation goes out have only the Si part to exist rate to be equivalent to by surface to the degree of depth be " there is rate in the unit area of separating out product or crystallized product based on Si " in the 10 μ m zones.

An example of EPMA condition determination is as follows.

Device: NEC society system " JXA8800 "

Electron ray accelerating potential: 20kV

Measure area: the mean value at 170 μ m * 170 μ m, a n=3 position is adopted in 1 visual field

Measure electric current: 1.3 * 10 ^-6A

The computing method that have rate: carry out EPMA under these conditions, respectively for Fe and Si, when the average statistics value is X, with statistical value is that the zone of 0～2.5X is as a, with the zone more than the 2.5X as b, to all measure area and be categorized as 2 kinds of numerical value, the area of regional b accounts for the exist rate of the ratio of mensuration area all (a+b) as various elements.In addition, Fe and Si separately the area of the intersection of field b account for the ratio of measuring all a+b of area the rate that exists as compound between the FeSi metalloid.

In addition, the length of making plate rolling direction as the support device for lithographic printing plate that will obtain as mentioned above is that the rectangle section of 1.5m is when placing on the platform, preferably on each limit parallel with plate rolling direction, the maximum height of lug boss is below the 2.0mm, the number of lug boss is below 5, and the total of lug boss highly is below the 4.0mm.In addition, during the projection of the angle of section, it is also included within the number of lug boss.In addition, in the inboard of aluminium sheet, also the maximum height of preferred lug boss is below the 2.0mm, and the number of lug boss is below 5, and the total of lug boss highly is below the 4.0mm.

The concrete assay method of the height of aluminium sheet lug boss and number as shown in figure 13.Figure 13 is the side view by the direction observation vertical with plate rolling direction of the assay method of the bossing of the suitable aluminium sheet that uses among expression the present invention.The length that cut-out aluminium sheet 501 is made plate rolling direction is the rectangle section of 1.5m, place on the platform 502, placing the pressing plate 503 that covers more than the section overall with in the 0.25m place inwards by each limit vertical with plate rolling direction, flatten and curl, length 1m for the inboard, can correctly measure the lug boss 4 of 2 limits and the aluminium sheet inboard parallel, on the basis of this state, measure the height and the number of lug boss 4 with plate rolling direction.

If the maximum height of aluminium sheet lug boss, number and total height are in above-mentioned scope, the maximum height of the lug boss of original edition of lithographic printing plate of the present invention, number and total highly are easy to reach given range.

In addition, the aluminium sheet preferred profile is shaped as following material.If the aluminium sheet section shape is following shape, the maximum height of the lug boss of aluminium sheet, number and total highly are easy to reach above-mentioned scope, and then the maximum height of the lug boss of original edition of lithographic printing plate of the present invention, number and total highly are easy to reach given range.

Usually, aluminium sheet is made coiled material, with in the state of reeling is during given certainly.In the cross section of plate, the end of plate if promptly limit portion is blocked up, reaches thousands of m, be wound into the coiled material shape carry out keeping during, thick part causes plastic yield, the end distortion of limit distortion occurs being called.Equally,, cause plastic yield, the inboard distortion of intermediate deformation occurs being called if the thickness of plate inboard is blocked up.

The appearance of intermediate deformation is compared with the limit distortion, and the trend that is difficult to take place is arranged, and therefore, among the present invention, preferentially prevents the appearance of limit distortion, and preferably the thickness of slab with the plate inboard is processed into thicker slightly than plate end.Specifically, in order to be controlled at below the certain numerical value with respect to the limit portion thickness of slab of the average thickness of slab of plate, a value that is preferably as follows described definition is below 1.0.In addition, blocked up with respect to average thickness of slab for the thickness of slab that does not make the plate inboard, the pc value that is preferably as follows described definition is below 2.0%.In above-mentioned cold rolling process, by adjusting the deflection profile of cold rolling cylinder, a value and pc value can be adjusted into the numerical value of hope.

a＝h/c

pc＝c/tc×100(％)

H: limit portion thickness of slab and minimum thickness of slab poor

C: maximum thickness of slab of central portion and minimum thickness of slab poor

Tc: the maximum thickness of slab of central portion

The cut-open view of being observed by plate rolling direction of the section shape of the aluminium sheet that be fit to use among expression the present invention as shown in figure 14.

Support device for lithographic printing plate is being made in the original edition for lithographic printing plate, can be in the surface-coated emulsion, drying forms photographic layer.

Among the present invention, preferably after forming photographic layer, curl (defective of curling) of correction plate makes original edition of lithographic printing plate.As proofreading and correct the method for curling, for example use photographic layer is applied the tension force that the crackle degree do not occur, in the cylinder leveller, it is transferred in the method for proofreading and correct curl-correcting devices such as cylinder.If curling of correction plate, residual mechanical stress liberation, therefore the maximum height of the lug boss of original edition of lithographic printing plate of the present invention, number and total highly are easy to reach given range.

Emulsion is not particularly limited, and can use the material that is generally used for the photosensitive lithographic plate master.So, by original edition of lithographic printing plate, use typographical printing film (lithfilm) to burn epigraph to obtaining, carry out video picture processing and gluing again and handle, can make the lithographic plate that can be installed on the printing machine.In addition, for example also highly sensitive photographic layer can be set, use laser directly to burn epigraph.

As emulsion so long as the material that changes with respect to the dissolubility or the swelling of imaging liquid before and after the exposure get final product.Representational material is as described below.

(A) photographic layer that constitutes by o-quinonediazide

As positive type photosensitive compounds, for example be the o-quinonediazide of representative with adjacent naphthoquinone two azide.As adjacent naphthoquinone two azide, put down in writing in the preferred special public clear 43-28403 communique 1, the ester of 2-azo naphthoquinones sulfonic acid chloride and pyrogallol-acetone resin.Put down in writing in also preferred the 3rd, 046, No. 120 instructionss of United States Patent (USP) and the 3rd, 188, No. 210 instructionss of United States Patent (USP) 1, the ester of 2-azo naphthoquinones sulfonic acid chloride and phenol-formaldehyde resin.Also can use other known adjacent naphthoquinone two azide.

Particularly preferred adjacent naphthoquinone two azide be by molecular weight in the polyol below 1000 and 1, the compound that 2-azo naphthoquinones sulfonic acid chloride reaction obtains.With respect to the hydroxyl of the polyol of 1 equivalent, preferred 1,2-azo naphthoquinones sulfonic acid chloride is with the ratio reaction of 0.2～1.2 equivalent, especially preferably with the ratio reaction of 0.3～1.0 equivalent.As 1,2-azo naphthoquinones sulfonic acid chloride, preferred 1,2-azo naphthoquinones-5-sulfonic acid chloride also can use 1,2-azo naphthoquinones-4-sulfonic acid chloride.

Adjacent naphthoquinone two azide is various 1, the potpourri of the material that the substituting group position of 2-azo naphthoquinones sulfonic acid chloride is different with the introducing amount, hydroxyl all is converted into 1, the material of 2-azonaphthalene diazide sulfonic acid ester accounts for preferred 5 moles more than the % of the ratio containing ratio of material of esterification (fully) of potpourri, more preferably 20～90 moles of %, preferred especially 20～99 moles of %.

In addition, do not use adjacent naphthoquinone two azide,, for example can use the polymkeric substance of putting down in writing in the special public clear 56-2696 communique yet with adjacent nitro methyl alcohol ester group as the effective photosensitive compounds of positive type.And, also can use combination by the acidic compound of photolysis with have by acid dissociation-C-O-C-base or-compounds of C-O-Si-base.For example; by the acidic compound of photolysis; with acetal or O, the combination of N-acetal compound (spy opens clear 48-89003 communique); combination (spy opens clear 51-120714 communique) with ortho esters or acylamino-acetal compound; combination (spy opens clear 53-133429 communique) with the polymkeric substance that has acetal or ketal radical on the main chain; with enol ether combination of compounds (spy opens clear 55-12995 communique); combination (spy opens clear 55-126236 communique) with N-acyl group imino group carbon compound; combination (spy opens clear 56-17345 communique) with the polymkeric substance that has the ortho acid ester group on the main chain; (spy opens clear 60-37549 communique with silyl ester combination of compounds (spy opens clear 60-10247 communique) and with the silyl ether combination of compounds; the spy opens clear 60-121446 communique) etc.

In the photosensitive composite of photographic layer, preferred 10～50 quality % of the ratio that positive type photosensitive compounds (also comprising the combinations thereof class) accounts for, more preferably 15～40 quality %.

O-quinonediazide also can constitute photographic layer separately, but preferred with (bonding agent, the resin that dissolves in buck binder) uses simultaneously as bonding agent.As the resin that dissolves in buck, for example phenolics, phenol-formaldehyde resin, metacresol-formaldehyde resin, paracresol-formaldehyde resin, between/to cresols-formaldehyde resin, phenol/cresols mixes (between can being, right, between/in mixing any one)-cresol-formaldehyde resins such as formaldehyde resin, phenol-modified xylene resin, polycarboxylated styrene, poly-halogenated hydroxyl styrene, the spy opens the disclosed acrylic resin that contains the phenol hydroxyl in the clear 51-34711 communique, acrylic resin of putting down in writing in the Te Kaiping 2-866 communique or urethanes resin etc. with sulfonamido.The resin preferred weight mean molecular weight that dissolves in buck is 500～20,000, and the number mean molecular weight is 200～60,000.

Below 70 quality % of whole photosensitive composites, contain the resin that dissolves in buck.And, as United States Patent (USP) the 4th, 123, No. 279 instructions is described, merge to use by tert-butyl benzene resinox, octyl phenol-formaldehyde resin class and have phenol that carbon number is 3～8 alkyl and the resin that formaldehyde condensation polymer obtains as substituting group, can improve the quick property of fat of image, thus desirable.

In photosensitive composite, in order to improve susceptibility, can contain cyclic acid anhydride, directly obtain the printing agent of visual image after being used to expose, as the dyestuff of image colorant and other packing material etc.The 4th, 115, No. 128 instructionss of cyclic acid anhydride such as United States Patent (USP) are described, can use phthalic anhydride, tetrabydrophthalic anhydride, hexahydrophthalic anhydride, 3,6-bridging oxygen-△ ⁴-tetrabydrophthalic anhydride, tetrachlorophthalic tetrachlorophthalic anhydrid, maleic anhydride, chloromaleic acid acid anhydride, α-phenyl maleic anhydride, succinic anhydride, pyromellitic acid acid anhydride etc.By quality with respect to whole photosensitive composites, make it to contain cyclic acid anhydride 1～15 quality %, maximum can improve 3 times of susceptibilitys.As the printing agent that directly obtains visual image after being used to expose, for example with the representative that is combined as of the photosensitive compounds of emitting acid by exposure and the organic dyestuff that can form salt.

Specifically, the for example special clear 50-36209 communique, spy opened opened the combination that adjacent naphthoquinones diazido-4-sulfonic acid halide of putting down in writing in the clear 53-8128 communique and salt form the property organic dyestuff, and the perhaps special clear 53-36233 communique, spy opened opened clear 54-74728 communique, spy and opened clear 60-3626 communique, spy and open clear 61-143748 communique, spy and open the trihalomethyl compound put down in writing in clear 61-151644 communique and the clear 63-58440 communique of Te Kai and the combination of salt formation property organic dyestuff.As the colorant of image, also can use above-mentioned salt formation property organic dyestuff other dyestuff in addition.Containing the suitable dyestuff of salt formation property organic dyestuff is oil-soluble dyes or basic dye.

Specifically, oil yellow (oil yellow) #101 for example, oil yellow #103, oil-bound distemper red (oil pink) #312, glossy dark green (oil green) BG, oil blue (oil bule) BOS, oil blue #603, glossy black (oilblack) BY, glossy black BS, glossy black T-505 (above all is Olient chemical industrial company system), Victoria's ethereal blue (Victoria Pure Blue), crystal violet (crystal violet) (CI42555), methyl violet (methyl violet) (CI42535), rhodamine (rhodamine) B (CI45170B), peacock green (malachite green) (CI42000), methylenum careuleum (methylene blue) (CI52015) etc.Preferred especially spy opens the dyestuff of putting down in writing in the clear 62-293247 communique.

Photosensitive composite is dissolved in the solvent of the above-mentioned various compositions of dissolving, is coated on the support device for lithographic printing plate.As solvent, for example ethylene dichloride, cyclohexanone, MEK, glycol monoethyl ether, ethylene glycol monoethyl ether, 2-methoxy ethyl acetic acid esters, 1-methoxyl-2-propyl alcohol, 1-methoxyl-2-propyl-acetic acid ester, toluene, methyl acetate, ethyl acetate, methyl lactate, ethyl lactate, diformazan family estate sulfone, dimethyl acetamide, dimethyl formamide, water, N-Methyl pyrrolidone, tetrahydrofurfuryl alcohol, acetone, diacetone alcohol, methyl alcohol, ethanol, isopropyl alcohol, diglycol, methyl ether etc.They also can mix use.

Mentioned component in the solution (solid state component) accounts for 2～50 quality %.Coated weight is according to purposes and difference, usually as the preferred 0.5～3.0g/m of solid state component ²Along with coated weight reduces, photonasty increases, but the rerum natura of light-sensitive surface reduces.

In order to make coating better, can contain surfactant in the photosensitive composite, for example special fluorine class surfactant of putting down in writing in the clear 62-170950 communique of opening.The content of surfactant preferred all 0.01～1 quality % of photosensitive composite, more preferably 0.05～0.5 quality %.

(B) photographic layer that constitutes by diazo resin and bonding agent

As feminine gender effect type photonasty diazo-compounds, be fit to use United States Patent (USP) the 2nd, 063, No. 631 instructionss and United States Patent (USP) the 2nd, 667, No. 415 disclosed diazo salts of instructions and aldol or acetal have the reaction product of the organic condensating agent of reactive carbonyl, i.e. the condensation product of diphenylamine-right-diazo salt and formaldehyde (so-called photonasty diazo resin).

Other useful condensation diazo-compounds is documented in special public clear 49-480001 communique, special public clear 49-45322 communique, the special public clear 49-45323 communique etc.The photonasty diazo-compounds of this type obtains with the form of water-soluble inorganic salt usually, therefore can be used as aqueous solution and applies.In addition; also can use the method for putting down in writing according in the public clear 47-1167 communique of spy; make water-soluble diazo-compounds and have 1 or 1 above phenol hydroxyl, sulfonyl or the aromatic series of the two or fatty compound reaction; this product, promptly water-fast in fact photonasty diazo resin.

The content of diazo resin can contain 5～50 quality % in photographic layer.If this content tails off, photonasty increases certainly, but stability in time reduces.The content of optimal diazo resin is about 8～20 quality %.On the other hand,, can use various polymkeric substance, preferably have the polymkeric substance of functional groups such as hydroxyl, amino, carboxyl, acylamino-, sulfonamido, active methylene group, mercapto, epoxy radicals as bonding agent.

Specifically, comprise BrP the 1st in this polymkeric substance, 350, the shellac of putting down in writing in No. 521 instructionss, BrP the 1st, 460, No. 978 instructionss and United States Patent (USP) the 4th, 123, the polymkeric substance of putting down in writing in No. 276 instructionss that hydroxyethyl (methyl) acrylate unit is contained as main recurring unit, United States Patent (USP) the 3rd, 751, the polyamide of putting down in writing in No. 257 instructionss, BrP the 1st, 074, phenolic resin of putting down in writing in No. 392 instructionss and tygon dimethoxym ethane resin for example, polyvinylbutyral resene polyvinyl acetal resin, United States Patent (USP) the 3rd, the poly-urethane resin of the wire of putting down in writing in 660, No. 097 instructionss, the phthalate resin of polyvinyl alcohol (PVA), the epoxy resin that obtains by bisphenol-A and chloropropylene oxide, poly-aminobenzene ethene or poly-alkylamino (methyl) esters of acrylic acid have amino polymkeric substance, cellulose acetate, the cellulose alkyl ether, cellulose derivatives such as cellulose acetate phthalate.

Can contain BrP the 1st, 041 again in the composition that constitutes by diazo resin and bonding agent, adjuvant such as the phosphoric acid of putting down in writing in the 3rd, 236, No. 646 instructionss of pH indicator, United States Patent (USP) of putting down in writing in No. 463 instructionss, dyestuff.

Preferred 0.1～30 μ m of the thickness of photographic layer, more preferably 0.5～10 μ m.The amount of the photographic layer that is provided with on support device for lithographic printing plate (solid state component) is generally about 0.1～7g/m ², preferred 0.5～4g/m ²

The original edition of lithographic printing plate that obtains like this adopts conventional method to comprise the processing of video picture, thereby forms resin image behind image exposure, becomes lithographic plate.

For example, in the occasion of positive type photosensitive lithographic plate master, behind the image exposure with photographic layer (A), by using the aqueous alkali video picture of putting down in writing in the 4th, 259, No. 434 instructionss of United States Patent (USP) and the flat 3-90388 communique of Te Kai, remove the photographic layer of exposed portion, obtain lithographic plate.

In addition, occasion at cloudy type photosensitive lithographic plate master with photographic layer (B) of forming by diazo resin and bonding agent, behind the image exposure, for example by using United States Patent (USP) the 4th, 186, the photographic layer of unexposed portion is removed in the imaging liquid video picture of putting down in writing in No. 006 instructions, obtains lithographic plate.In addition, open flat 5-2273 communique or the special occasion of opening the cloudy type photosensitive lithographic plate master of putting down in writing in the flat 4-219759 communique the spy, as described in this communique, the aqueous solution video picture by with alkali silicate obtains lithographic plate.

As mentioned above, the original edition of lithographic printing plate of the present invention that obtains is that aluminium sheet has been carried out the asperities processing, emulsion applies and the dry original edition of lithographic printing plate that obtains, it is characterized in that, the length of making plate rolling direction is 600～2000mm, with plate rolling direction vertical direction wide be the rectangle section of 800～1500mm, when placing on the platform, on each limit vertical with plate rolling direction, the maximum height of lug boss is below the 2mm, and below the preferred 1.5mm, the number of lug boss is below 3, preferred below 2, the total of lug boss highly is below the 4mm, below the preferred 3.0mm, on each limit parallel with plate rolling direction, the maximum height of lug boss is below the 1.5mm, below the preferred 1.0mm, the number of lug boss is below 3, and is preferred below 2, the total of lug boss highly is below the 3mm, below the preferred 2.5mm.In addition, when the projection of the angle of section, it is also contained in the number of lug boss.

By adopting said structure, the carrying of original edition of lithographic printing plate of the present invention and printing machine installation property is all good.

The concrete assay method of the height of the lug boss of original edition of lithographic printing plate and number as shown in figure 15.Figure 15 is the side view of being observed by the direction vertical with plate rolling direction of assay method of the lug boss of expression original edition of lithographic printing plate of the present invention.Cut off original edition of lithographic printing plate 510, the length of making plate rolling direction be 600～2000mm, with the rectangle section of the wide 800～1500mm of being of plate rolling direction vertical direction, place on the platform 502, measure height and number with the lug boss 504 on vertical 2 limits of plate rolling direction and 2 limits (can see one side of front among Figure 15) parallel with plate rolling direction.

Except that above-mentioned, the surface roughness of the preferred reverse side of original edition of lithographic printing plate of the present invention (for example, the arithmetic mean rugosity of stipulating among the JIS B0601-1994.Down together.) different on plate rolling direction and perpendicular direction, and, the surface roughness R of the direction that surface roughness is big _aBe R _Al, direction that surface roughness is little surface roughness R _aBe R _AsThe time, R _Al/ R _AsValue be 1.1～5.0.

Describe with figure below.Figure 16 is the oblique view of an example of original edition of lithographic printing plate of the present invention.Lithographic plate 510 is made up of supporter 512 and the photographic layer 514 that is arranged on this supporter 512 surperficial 512a.In addition, because actual photographic layer is the thickness of 1 μ m, therefore to be that 100～500 μ m aluminium sheets are compared extremely thin with thickness, and (Figure 17 too Figure 16 pattern photographic layer to be shown as thick form.)。In suitable method of the present invention, the reverse side 512b of supporter 512 (original edition of lithographic printing plate 510) in plate rolling direction (vertically, arrow x among Figure 16) and perpendicular direction (laterally, arrow y among Figure 16) has different surface roughness Ra on, and, the surface roughness R of the direction that surface roughness is big _aBe R _Al, direction that surface roughness is little surface roughness R _aBe R _AsThe time, R _AlWith R _AsSatisfy following formula.

1.1≤R _al/R _as≤5.0

In the cold rolling process of above-mentioned manufacturing aluminium sheet, be replicated in the reverse side of aluminium sheet by pattern with rolling cylinder, can make the surface roughness of aluminium sheet reverse side satisfy above-mentioned relation.In addition, in the correcting process of above-mentioned manufacturing aluminium sheet, use to have the cylinder of wishing the surface roughness pattern, also this pattern can be replicated in the reverse side of supporter.If the surface roughness that makes reverse side by this method in given scope, there is no need to be provided with in addition the operations such as asperities processing to reverse side, operation is simplified, thereby desirable.

For example, the cylinder of surface roughness that has the cylinder sense of rotation by use and the pattern different with the surface roughness of cylinder sense of rotation vertical direction carries out cold rollingly etc., and can make on plate rolling direction and the perpendicular direction has different surface roughnesses.

Adopt the original edition of lithographic printing plate of this mode, reverse side has different surface roughness mutually on plate rolling direction and perpendicular direction, two surface roughnesses satisfy above-mentioned relation, therefore by travelling belt or conveying roller carrying the time, different friction force plays a role to reverse side on plate rolling direction and perpendicular direction.So, on the plate rolling direction by the original edition of lithographic printing plate reverse side and the perpendicular direction mutually different friction force play a role slip or swing in the time of can effectively preventing to carry.

The slip when preventing to carry or the viewpoint of swing, R _AlAnd R _AsUnreasonablely think greatly more, but as shown in figure 17, original edition of lithographic printing plate 510 is at state 510 ' that is being rolled into the cylinder shape and overlapping state 510 "; the reverse side 512b of supporter 512 (original edition of lithographic printing plate 510) contacts with the surperficial 514a of photographic layer 514; so the occasion that contacts with the surperficial 514a of photographic layer 514 of the reverse side 512b of supporter 512 (original edition of lithographic printing plate 510); in order to prevent flaw to occur on the surperficial 514a, R _AlAnd R _AsMore for a short time, unreasonablely think.

Therefore, in order to improve carrying property simultaneously and to prevent to occur on the photographic layer flaw, R _AlMore than the preferred 0.15 μ m, more preferably more than the 0.20 μ m, in addition, below the preferred 0.40 μ m, more preferably below the 0.30 μ m.On the other hand, R _AsMore than the preferred 0.10 μ m, more preferably more than the 0.12 μ m, in addition, below the preferred 0.35 μ m, more preferably below the 0.20 μ m.

In addition, original edition of lithographic printing plate of the present invention preferably carries out slight asperities processing to the end of at least one limit to 1 by reverse side～50mm.

Below, describe with figure.Figure 18 is the figure of an example that the original edition of lithographic printing plate of the present invention of slight asperities processing has been carried out in the end of expression reverse side.Original edition of lithographic printing plate 510 is made up of supporter 512 and the photographic layer 514 that is provided with on the surperficial 512a of this supporter 512.As shown in figure 18, reverse side 512b at supporter 512 (original edition of lithographic printing plate 510), with 2 parallel limits of plate rolling direction (vertically, arrow x among Figure 18), only to being that (the banded scope of 1mm≤d≤50mm) is carried out slight asperities processing to d by limit to width.

Represented example that slight asperities processing has been carried out on 2 limits parallel with plate rolling direction among Figure 18, be limited to this structure but have more than, for example, shown in Figure 19 (a), can be only to carrying out slight asperities processing with 1 parallel limit of plate rolling direction (vertically, arrow x among Figure 19), shown in Figure 19 (b), also can with 1 limit or 2 limits of plate rolling direction vertical direction (laterally, arrow y among Figure 19), only to being that the banded scope of d is carried out slight asperities processing by end to width.

With given width the end of reverse side is carried out in the asperities processing, when the processing of galvanochemistry asperities was carried out on the surface of aluminium sheet, the preferred utilization produced an amount of back side winding.Usually, if the processing of galvanochemistry asperities is carried out on the surface (forming the face of photographic layer side) of aluminium sheet, in the asperities processing, line of electric force twines overleaf, sometimes the part of reverse side is carried out slight asperities processing.By utilizing this technology, can carry out the asperities processing of surface and reverse side simultaneously, operation is simplified, thereby desirable.When utilizing line of electric force to twine overleaf, wideer by the width that makes electrode than the width of aluminium sheet, and regulate the thickness that there is the zone in the electrolytic solution that contacts the aluminium sheet reverse side, the scope of asperities processing and the degree of asperities processing can be adjusted to suitable scope.In addition, in order only machinery, chemistry or the processing of galvanochemistry asperities to be carried out in the end of reverse side, also can add other operation.

The original edition of lithographic printing plate of this mode has the zone of having carried out the processing of given width asperities at least one end of reverse side, during therefore by travelling belt or conveying roller carrying, in the zone that reverse side has carried out the asperities processing, and band or cylinder between have big friction force to play a role.Play a role slip or swing in the time of to prevent to carry effectively by the big friction force in original edition of lithographic printing plate reverse side end.

What implement slight asperities processing in the reverse side is to play the wide zone of 1～50mm by the end of any one or both ends of plate rolling direction or perpendicular direction.If be lower than 1mm, then can not bring into play the effect of anti-sliding stop sometimes.If surpass 50mm, then not only reverse side is carried out the instrument complexity of asperitiesization, and the required cost increase of asperities processing, undesirable economically.

Wherein, " slight asperities processing " is meant the asperities processing that asperities treatment conditions that comparison surface (forming the face of photographic layer one side on the aluminium sheet) at least carries out relax.Just, the surface roughness of the asperities processing region of reverse side is compared with the surface roughness of asperities treatment surface, tails off and diminishes.Implement the zone of slight asperities processing, preferably its surface roughness R _aBe 0.15～0.50 μ m.Particularly, the viewpoint of damage photographic layer 514 is considered when preventing with cylinder state when keeping or stacked packing, implements more preferably 0.15～0.40 μ m of surface roughness in the zone of slight asperities processing.

In addition, to remove behind the photographic layer coefficient of thermal expansion with plate rolling direction vertical direction be 1.0 * 10 to original edition of lithographic printing plate of the present invention ^-5～2.5 * 10 ^-5Be plate rolling direction coefficient of thermal expansion 80～98%, after wherein making in length and breadth length and being the rectangle section of 500～1000mm, under 80～270 ℃, carry out heat treated, then put cold, when placing on the platform, in each limit on preferred 4 limits, the maximum height of lug boss is below the 3mm, and the number of lug boss is below 4, and the total of lug boss highly is below the 5mm.In addition, during the projection of the angle of section, be also included within the number of lug boss.

After original edition of lithographic printing plate of the present invention made in length and breadth length and be the rectangle section of 500～1000mm, under 80～270 ℃, carry out heat treated, then put cold, when placing on the platform, make in each limit on 4 limits, the maximum height of lug boss reaches below the 3mm, the number of lug boss reaches below 4, the total of lug boss highly reaches below the 5mm, even burn thermal treatment in order to improve anti-brush, can not make carrying property and printing machine installation property variation yet, can carry without a doubt and be installed on the printing machine.

In order to make original edition of lithographic printing plate of the present invention at the maximum height of lug boss after the heat treated, number and add up to height in above-mentioned scope, the coefficient of thermal expansion of removing behind the photographic layer of original edition of lithographic printing plate with plate rolling direction vertical direction is preferably 1.0 * 10 ^-5More than, more preferably 1.5 * 10 ^-5More than, and be preferably 2.5 * 10 ^-5Below, more preferably 2.3 * 10 ^-5Below.In addition, remove more than 80% of coefficient of thermal expansion that is preferably plate rolling direction behind the photographic layer with the coefficient of thermal expansion of plate rolling direction vertical direction, more preferably more than 83%, and be preferably below 98%, more preferably below 95%.

If the coefficient of thermal expansion of removing behind the photographic layer with plate rolling direction vertical direction surpasses 2.5 * 10 ^-5, when carrying out hot video picture and handling, do not depend on hot video picture handle in the carrying direction of lithographic plate and lithographic plate in length and breadth or the relativeness of plate rolling direction, lithographic plate is sometimes because heat produces distortion after the video picture.On the other hand, prevent lithographic plate since heat produce distortion aspect, remove behind the photographic layer that coefficient of thermal expansion with plate rolling direction vertical direction is more little unreasonablely to be thought, but make it to be lower than 1.0 * 10 ^-5, be difficult in reality, therefore the angle from being easy to make is preferably 1.0 * 10 ^-5More than.In addition, remove behind the photographic layer coefficient of thermal expansion with plate rolling direction vertical direction and surpass 98% o'clock of coefficient of thermal expansion of plate rolling direction or be lower than at 80% o'clock, lithographic plate equally can be because heat produces distortion sometimes.

Therefore, by make behind the photographic layer of removing original edition of lithographic printing plate of the present invention with the coefficient of thermal expansion of plate rolling direction vertical direction as mentioned above, make maximum height, the number of lug boss after the original edition of lithographic printing plate heat treated easily and add up to the above-mentioned scope that highly reaches.

Removing behind the photographic layer of original edition of lithographic printing plate of the present invention can be by adjusting the cold rolling program list of above-mentioned aluminium sheet to the adjustment of coefficient of thermal expansion, or adjusts regularly (timing) and carry out intermediate annealing and handle and carry out in cold-rolled process.

In addition, the Sven-Gan Eriksson value that original edition of lithographic printing plate of the present invention is preferably removed behind the photographic layer is more than 2, more preferably more than 4, is preferably more than 5 especially, and is preferably below 10, more preferably below 7, is preferably below 6 especially.Wherein, the reason of removing photographic layer is that the ratio of photographic layer etc. might be brought influence to the Sven-Gan Eriksson value, eliminates this worry for this reason if carry out Erichsen test under the state that photographic layer exists.

Remove the method for the Sven-Gan Eriksson value behind the photographic layer as control, for example control the method for the alloying component that contains in the aluminium sheet.Particularly,, the Sven-Gan Eriksson value can be increased, by increasing the amount of the interpolation element that contains in the aluminium alloy, the Sven-Gan Eriksson value can be reduced on the contrary by reducing the amount of the interpolation element that contains in the aluminium alloy.

In addition, remove other method of the Sven-Gan Eriksson value behind the photographic layer, for example control the method for hot rolling, cold rolling rolling rate as control.Particularly, the Sven-Gan Eriksson value can be increased, the Sven-Gan Eriksson value can be reduced by improving rolling rate on the contrary by reducing rolling rate.

And, remove other method of the Sven-Gan Eriksson value behind the photographic layer as control, for example control the method for intermediate annealing.Particularly,, the Sven-Gan Eriksson value can be increased, by carrying out timing or reduction temperature as early as possible, the Sven-Gan Eriksson value can be reduced on the contrary by near final thickness of slab the time, carrying out the timing of intermediate annealing or improve the intermediate annealing temperature.

If the Sven-Gan Eriksson value is excessive, when lithographic plate being installed on the printing machine folded end, except that having the unfavorable condition that is difficult to evenly bending, carry out with slitting shears severing processing, with slitting shears cut off processing, with guillotine tie cut off processing, with module bore a hole etc. perforation processing, cut off processing etc. with shearer and add man-hour, be easy to generate large-scale burr, on the anodic oxidation coating crack appears easily simultaneously, when printing, the unfavorable condition of spot can appear easily producing.In addition, if the Sven-Gan Eriksson value is too small, when version is installed on printing machine, in the operation of bending plate end, plate can appear easily from the kink fracture, so the unfavorable condition of operability difference.

In addition, its method has been stipulated in Erichsen test in JIS Z2247, be general method, but in the present invention, be characterised in that adjustment carries out the asperities processing, applies emulsion and dry and remove Sven-Gan Eriksson value behind the photographic layer of gained original edition of lithographic printing plate aluminium sheet.

Embodiment

(embodiment 1～7 and comparative example 1 and 2)

1-1. the manufacturing of support device for lithographic printing plate

The aluminium alloy of forming shown in the DC casting table 2 1～9 respectively behind this ingot bar of building up by welding, carries out heat treated, all thermal treatment, hot rolling, cold rolling, intermediate annealing, cold rolling and proofread and correct successively, obtains aluminium alloy plate.

Table 2

Aluminium alloy	Fe content (quality %)	Si content (quality %)	Fe/Si	Cu content (quality %)	Ti content (quality %)	Mg content (quality %)	Mn content (quality %)	Zn content (quality %)	V content (quality %)	Ga content (quality %)
Aluminium alloy	Fe content (quality %)	Si content (quality %)	Fe/Si	Cu content (quality %)	Ti content (quality %)	Mg content (quality %)	Mn content (quality %)	Zn content (quality %)	V content (quality %)	Ga content (quality %)	1 2 3 4 5 6 7 8 9	0.3 0.18 0.2 0.35 0.3 0.3 0.3 0.13 0.42	0.1 0.05 0.1 0.04 0.1 0.1 0.1 0.10 0.04	3 3.6 2 8.75 3 3 3 1.3 10.5	0.003 0.003 0.003 0.003 0.01 - 0.02 0.003 0.003	0.01 0.01 0.01 0.01 0.03 0.002 0.002 0.01 0.01	- - - - 0.01 0.01 - - -	- - - - 0.01 0.01 - - -	- - - - 0.008 0.008 - - -	0.01 0.01 0.01 0.01 0.005 - 0.02 0.01 0.01	0.007 0.007 0.007 0.007 0.007 - 0.015 0.007 0.007

For the aluminium alloy plate that obtains, carry out chemical etching with sodium hydrate aqueous solution and handle, after the washing, carry out chemical etching with aqueous hydrochloric acid solution and handle.After the washing, in aqueous hydrochloric acid solution, carry out the processing of galvanochemistry asperities by carrying out alternating current electrolysis.After the washing, slightly carry out chemical etching with dilute sodium hydroxide aqueous solution and handle, after the washing, carry out chemical etching with aqueous sulfuric acid and handle.So, after the washing, form anodic oxidation coating by in aqueous sulfuric acid, carrying out dc electrolysis, obtain the support device for lithographic printing plate of each embodiment and comparative example.

1-2. the evaluation of chemical etching process uniformity and galvanochemistry asperities process uniformity

For the support device for lithographic printing plate that obtains, the homogeneity of difference evaluating chemical etch processes and the processing of galvanochemistry asperities.The evaluation of chemical etching process uniformity by visual inspection, is estimated uneven generation degree with 5 grades (zero, zero △, △, △ *, *).△ is the lower limit of permission.Scanning electron microscope (T-20, NEC society system) is used in the evaluation of galvanochemistry asperities process uniformity, estimates the homogeneity of cheating with 5 grades (zero, zero △, △, △ *, *).△ is the lower limit of permission.

The result is as shown in table 3.

As can be seen, support device for lithographic printing plate of the present invention (embodiment 1～7), because in the aluminium alloy that uses, Fe content and Si content are at particular range, and the mass ratio of Fe content and Si content (Fe/Si) is in specific scope, therefore respectively for chemical etching processing and the processing of galvanochemistry asperities, excellent in uniform.

With respect to this, in the aluminium alloy that uses, the mass ratio (Fe/Si) of Fe content and Si content is in the occasion (comparative example 1 and 2) of particular range, the lack of homogeneity of chemical etching processing.

Table 3

	Aluminium alloy plate	The homogeneity that chemical etching is handled	The homogeneity of galvanochemistry asperities processing
	Aluminium alloy plate	The homogeneity that chemical etching is handled	The homogeneity of galvanochemistry asperities processing	Embodiment
1 embodiment 2 embodiment 3 embodiment 4 embodiment 5 embodiment 6 embodiment 7 comparative examples 1 comparative example 2	1 2 3 4 5 6 7 8 9	○ ○ ○△ ○△ ○ ○△ ○ × ×	○ ○ ○ ○ ○ ○ ○ ○ ○	Embodiment

(embodiment 8～11 and comparative example 3～6)

2-1. the manufacturing of support device for lithographic printing plate

Aluminium alloy 5 shown in the DC casting table 2, behind this ingot bar of building up by welding, carry out heat treated, all thermal treatment, hot rolling, cold rolling, intermediate annealing, cold rolling and proofread and correct successively, when obtaining aluminium alloy plate, by changing the condition of each operation, obtained adjusting be positioned at the surface to the degree of depth be the aluminium alloy plate of the crystal grain size in 20 μ m zones.

Adopt method similarly to Example 1 to handle the aluminium alloy plate that obtains, obtain the support device for lithographic printing plate of each embodiment and comparative example.

2-2. the mensuration of the size of crystal grain (width and length)

After on the support device for lithographic printing plate photographic layer being set, exposure, remove photographic layer, grind with the emery sand paper of #800 the lithographic plate that obtains non-image part the surface to surface roughness Ra be below the 0.2 μ m, then, with particle diameter is that aluminium oxide mill material below the 3 μ m polishes that to be ground to surface roughness Ra be below the 0.1 μ m, is that the following aluminium oxide of 0.1 μ m grinds material and polishes that to be ground to surface roughness Ra be below the 0.1 μ m with particle diameter again.Then, carry out etching, make the aluminium meltage reach thickness 1～20 μ m, make the border (crystal grain edge) of crystal grain clear with the hydrofluoric acid aqueous solution of concentration 10 quality %.Use optical microscope to observe to it, take pictures, calculate the wide and length of crystal grain by the photo that obtains by polarizing filter.

The evaluation of support device for lithographic printing plate surface 2-3. planar (face matter pit and streak)

The evaluation that support device for lithographic printing plate surface is planar by visual inspection, has been removed planar (the face matter pit and the streak) of the non-image part of photographic layer with 5 grades (zero, zero △, △, △ *, *) evaluation.△ is the lower limit of permission.

The result is as shown in table 4.

As can be seen, support device for lithographic printing plate of the present invention (embodiment 8～11) is owing to be positioned at crystal grain wide and long all in given scope that surface to the degree of depth is 20 μ m zones, so face matter pit and all appearance of streak, and is planar good.

With respect to this, the occasion (comparative example 3,4 and 6) that the length of crystal grain is long, face matter pit and streak all occur.In addition, face matter pit appears in the wide excessive occasion (comparative example 5) of crystal grain.

Table 4

Aluminium alloy	The size of crystal grain		Planar
	The size of crystal grain		Planar		Wide (μ m)	Long (μ m)	Face matter pit	Streak
	Embodiment 8 embodiment 9 embodiment 10 embodiment 11 comparative examples 3 comparative examples 4 comparative examples 5 comparative examples 6	5 5 5 5 5 5 5 5	180 60 40 25 150 150 250 60	2800 600 400 150 4500 10000 600 3200	Wide (μ m)	Long (μ m)	Face matter pit	Streak	△ ○△ ○ ○ △× △× × ×	△ ○ ○ ○ △× × ○ △×

(embodiment 12 and comparative example 7～9)

3-1. the manufacturing of support device for lithographic printing plate

Aluminium alloy 1 shown in the DC casting table 2 behind this ingot bar of building up by welding, carries out heat treated, all thermal treatment, hot rolling, cold rolling, intermediate annealing, cold rolling and proofread and correct successively, obtains aluminium alloy plate.

Continuous annealing furnace is used in intermediate annealing, by the mode (carrying formula continuously) that continuous carrying aluminium alloy plate heats simultaneously, carries out under 480 ℃ 2 minutes.

Adopt method similarly to Example 1 to handle the aluminium alloy plate that obtains, obtain support device for lithographic printing plate of the present invention (embodiment 12).

In addition, aluminium alloy plate is being made under the state of coil, used periodic annealing furnace (batch furnace), heating down at 480 ℃ and carried out intermediate annealing in 5 hours, in addition, adopting method similarly to Example 12, obtaining support device for lithographic printing plate (comparative example 7).

In addition, except that not carrying out intermediate annealing, adopt method similarly to Example 12, obtain support device for lithographic printing plate (comparative example 8).

In addition, aluminium alloy plate is being made under the state of coil, used periodic annealing furnace (batch furnace), heating down at 480 ℃ and carried out intermediate annealing in 2 minutes, in addition, adopting method similarly to Example 12, obtaining support device for lithographic printing plate (comparative example 9).

The evaluation of support device for lithographic printing plate surface 3-2. planar (face matter pit and streak)

The face matter pit on support device for lithographic printing plate surface and the evaluation of streak are adopted with above-mentioned same method and are carried out.

The result is as shown in table 5.

As can be seen, carry out the manufacture method (embodiment 12) of the support device for lithographic printing plate of the present invention of intermediate annealing according to the mode that adopts continuously the carrying aluminium alloy plate to heat simultaneously, the size that can make crystal grain is in given range, the support device for lithographic printing plate surface that obtains is planar good, production that therefore can be stable.

With respect to this, the occasion (comparative example 7) of using periodic annealing furnace to carry out intermediate annealing, because the size of crystal grain is in given scope, therefore the support device for lithographic printing plate surface that obtains planar not necessarily good be difficult to stable production.In addition, do not carry out the occasion (comparative example 8) of intermediate annealing owing to do not cause recrystallization, so the size of crystal grain the situation at given range is not many, therefore the support device for lithographic printing plate surface that obtains planar not necessarily good be difficult to stable production.In addition, use periodic annealing furnace, carry out 2 minutes occasion of intermediate annealing (comparative example 9) similarly to Example 12, owing to do not cause recrystallization, obtain the result same with comparative example 8.

Table 5

	Aluminium alloy	Intermediate annealing			The size of crystal grain		Planar
		Intermediate annealing			The size of crystal grain		Planar		Mode	Temperature	Time	Wide (μ m)	Long (μ m)	Face matter pit	Streak
		Embodiment							Mode	Temperature	Time	Wide (μ m)	Long (μ m)	Face matter pit	Streak
12	1	Embodiment	Continuous carrying formula	480℃	2 minutes	100	400	○	○
12	1	Comparative example 7	Continuous carrying formula	480℃	2 minutes	100	400	○	○	1	The batch furnace formula	480℃	5 hours	200	3200	×	△ ×
Comparative example 8	1	Comparative example 7	Do not have	-	-	250	More than 10000	○	×	1	The batch furnace formula	480℃	5 hours	200	3200	×	△ ×
Comparative example 8	1	Comparative example 9	Do not have	-	-	250	More than 10000	○	×	1	The batch furnace formula	480℃	2 minutes	250	More than 10000	○	×

(embodiment 13～18 and comparative example 10～14)

II-1. the manufacturing of aluminium alloy plate

The Si that use contains Fe 0.30 quality %, contain the amount of Table 6 and Ti and contain the Al motlten metal of different Cu 0.001～0.038 quality % adopt the DC casting to make ingot bar.Then, carry out building up by welding processing according to conventional method.At this moment, adjust the content of Cu by the change amount of pruning at depth direction.Then, by keeping carrying out in about 5 hours equal thermal treatment down at 550 ℃.All after the thermal treatment, when temperature drops to 400 ℃, carry out hot rolling and handle.And, suitably carry out intermediate annealing processing, cold-rolling treatment, correction, being processed into thickness is 0.24mm, obtains aluminium alloy plate II-1～II-11.

II-2. the mensuration of each component content in the aluminium alloy plate

To the aluminium alloy plate that obtains, and carry out the mensuration of each component content with fluorescent x-ray analyzer (RIX3000, electronics of science society system) and apparatus for analyzing luminosity (PDA-5500, society of Shimadzu Seisakusho Ltd. system).

Fluorescent x-ray analyzer be suitable for determination and analysis the content of each composition of utmost point top layer on surface, it is the content of each composition in tens of μ m zone that apparatus for analyzing luminosity is suitable for measuring by surface to the degree of depth, and precision is better.Therefore, among the present invention,, make typical curve, proofread and correct this based on luminesceence analysis result and use with the typical curve that x-ray fluorescence analysis obtains to same standard sample with x-ray fluorescence analysis to form clear and definite standard sample.

Prepare various aluminium alloy plates, handle the aluminium alloy plate of removing 1 μ m surface and handle without the aluminium alloy plate of any processing, by alkaline etching and remove the aluminium alloy plate on 2 μ m surfaces by alkaline etching, they are carried out x-ray fluorescence analysis, obtain Cu content in each depth areas by the typical curve after the above-mentioned correction that obtains.

The numerical value of the Cu content of aluminium alloy plate, Si content, Ti content and (Cu content+Si content)/Ti content is as shown in table 6.In addition, Cu content is respectively to being that 1 μ m zone, the degree of depth are that 1～2 μ m zone and the degree of depth are that 2～3 μ m zones are represented by surface to the degree of depth, making it to merge, will be that to deduct the degree of depth be that the numerical value of the Cu content in 2～3 μ m zones is represented as " poor (ppm) " for the Cu content in 2 μ m zones by surface to the degree of depth.In addition, to use surface to the degree of depth be that the Cu cubage in 2 μ m zones goes out to the Cu content in the value of (Cu content+Si content)/Ti content.

Table 6

Aluminium alloy plate	The degree of depth on distance surface and Cu amount (quality %)			Difference (ppm)	Si measures (quality %)	Ti measures (quality %)	(Cu amount+Si amount)/Ti amount
								0～1μm	1～2μm	2～3μm
	II-1 II-2 II-3 II-4 II-5 II-6 II-7 II-8 II-9 II-10 II-11	0.017 0.010 0.025 0.008 0.003 0.025 0.025 0.003 0.017 0.010 0.040	0.017 0.010 0.025 0.008 0.003 0.025 0.025 0.003 0.017 0.010 0.040					0～1μm	1～2μm	2～3μm	0.014 0.008 0.020 0.006 0.001 0.020 0.020 0.001 0.017 0.010 0.035	30 20 50 20 20 50 50 20 0 0 50	0.1 0.1 0.1 0.1 0.1 0.1 0.13 0.04 0.1 0.1 0.1	0.03 0.03 0.03 0.03 0.03 0.005 0.005 0.05 0.03 0.03 0.03	3.9 3.7 4.2 3.6 3.4 25 31 0.86 3.9 3.7 4.7

II-3. the making of support device for lithographic printing plate

To the aluminium alloy plate II-1～II-11 that obtains, as described below, continuous surface is handled.

To aluminium alloy plate, carry out etch processes with NaOH solution, after the washing, use HNO ₃Solution carries out decontamination to be handled, after the washing, at HNO ₃Use alternating current to carry out the processing of electrolysis asperities in the solution.The processing of electrolysis asperities is 50C/dm at the total electric weight that flows into the Al anode ², 100C/dm ², 200C/dm ²And 300C/dm ²4 conditions under carry out.After the washing,, use H in order to remove the spot that generates in the processing of electrolysis asperities ₂SO ₄Solution carries out decontamination to be handled, and after the washing, carries out anodized again, obtains the various support device for lithographic printing plate of embodiment 13～18 and comparative example 10～14.

II-4. the inhomogeneity evaluation of the asperities of support device for lithographic printing plate

To various support device for lithographic printing plate, use the asperities that obtains under 4 electrolysis asperities of sem observation treatment conditions, estimate the homogeneity of asperities.With zero, zero △, △, △ *, * homogeneity of 5 grade evaluation asperities by good to poor.The result is as shown in table 7.

II-5. the evaluation of the anti-brush of lithographic plate

In sulfuric acid solution, at electric weight 200C/dm ²Each sample that carries out the processing of electrolysis asperities under the condition carries out anodized, and making the anodic oxidation coating amount is 1.5g/m ², carry out coating, the drying of photographic layer, make the image exposure video picture become lithographic plate after, be installed on the printing machine, print, the printing number when thinking that by visual inspection the concentration of all images begins attenuation is estimated anti-brush.Evaluation uses the number that embodiment 17 printings are finished to represent as 100 o'clock relative value.

By table 6 and table 7 as can be seen, the electric weight that uses in support device for lithographic printing plate of the present invention (embodiment 13～18) and the processing of electrolysis asperities is irrelevant, has uniform asperities all the time.In addition, support device for lithographic printing plate of the present invention forms dell in the processing of electrolysis asperities, and excellent in uniform, and the anti-brush during therefore as lithographic plate is good.

With respect to this, the occasion (comparative example 10) that the numerical value of (Cu content+Si content)/Ti content is excessive, great majority form thick hole, can not form uniform asperities, in addition, too small occasion (comparative example 11), that cheats is circular imperfect, can not form uniform asperities.In addition, surface to the degree of depth is that Cu content and the degree of depth in 2 μ m zones is the occasion (comparative example 12 and 13) that the Cu content in zone more than the 2 μ m does not have difference, and along with electric weight becomes greatly, it is inhomogeneous that asperities becomes.In addition, the occasion (comparative example 14) that Cu content is too much becomes inhomogeneous with the irrelevant asperities of electric weight.In addition, they are because asperities is inhomogeneous, and anti-brush is poor.

Table 7

	Aluminium alloy plate	The homogeneity of asperities				Electric weight is 200C/dm ²The anti-brush of sample during as lithographic plate
		The homogeneity of asperities					Electric weight (C/dm in the processing of electrolysis asperities ²)
		50	100	200	300
		50	100	200	300		Embodiment 13 embodiment 14 embodiment 15 embodiment 16 embodiment 17 embodiment 18	II-1 II-2 II-3 II-4 II-5 II-6	○ ○ ○ ○ ○ ○	○ ○ ○ ○ ○ ○	○ ○ ○ ○ ○ ○	○ ○ ○ ○ ○ ○	115 110 120 105 100 120
Comparative example 10 comparative examples 11 comparative examples 12 comparative examples 13 comparative examples 14	II-7 II-8 II-9 II-10 II-11	△× × ○ ○ ×	△× × ○ ○ ×	△× × △ △× ×	△× × △× × ×	85 70 90 85 80		II-1 II-2 II-3 II-4 II-5 II-6	○ ○ ○ ○ ○ ○	○ ○ ○ ○ ○ ○	○ ○ ○ ○ ○ ○	○ ○ ○ ○ ○ ○	115 110 120 105 100 120

(embodiment 19～52 and comparative example 15 and 16)

III-1. the manufacturing of aluminium alloy plate

Use contains Fe, Cu, Si and Ti, also contains the Al motlten metal of Mg:0.001 quality % and various specific trace elements, and in addition, the same method of occasion of employing and embodiment 13～18 and comparative example 10～14 obtains aluminium alloy plate.In addition, in embodiment 52 and the comparative example 16, use the Al motlten metal that does not contain specific trace element.

III-2. the mensuration of each component content in the aluminium alloy plate

Adopt the same method of occasion with embodiment 13～18 and comparative example 10～14, carry out the mensuration of each component content in the aluminium alloy plate.The measurement result of the specific micronutrient levels in the aluminium alloy plate is as shown in table 8.In addition, the content of the Fe in the aluminium alloy plate, Cu, Si and Ti, identical to the aluminium alloy plate that uses among the embodiment 19～52 with above-mentioned aluminium alloy plate II-1, to the aluminium alloy plate that uses in comparative example 15 and 16, identical with above-mentioned aluminium alloy plate II-9.

III-3. the making of support device for lithographic printing plate

For the aluminium alloy plate that obtains, in hydrochloric acid solution, use alternating current under 1 condition, to carry out the processing of electrolysis asperities, to surface roughness (Ra, cut-out value 0.8mm, evaluation length 4mm) is 0.6 μ m, in addition, the same method of occasion of employing and embodiment 13～18 and comparative example 10～14, continuous surface is handled, and obtains each support device for lithographic printing plate of embodiment 19～52 and comparative example 15 and 16.Be determined in the processing of electrolysis asperities, when surface roughness Ra is 0.6 μ m, flow into total electric weight of Al anode.The measurement result of electric weight is as shown in table 8.

III-4. the inhomogeneity evaluation of the asperities of support device for lithographic printing plate

To various support device for lithographic printing plate, use the sem observation asperities, estimate the homogeneity of asperities.With zero, zero △, △, △ *, * homogeneity of 5 grade evaluation asperities by good to poor.The result is as shown in table 8.

As can be seen from Table 8, the asperities excellent in uniform of support device for lithographic printing plate of the present invention (embodiment 19～52).In addition, the electric weight that uses the support device for lithographic printing plate of the present invention (embodiment 19～51) of the aluminium alloy plate contain specific trace element to use in the processing of electrolysis asperities than the occasion that does not contain specific trace element (embodiment 52) lacks, therefore ideal.

Table 8

	Basis	Specific trace element	Content (ppm)	Electric weight (the C/dm that uses in the processing of electrolysis asperities ²)	The homogeneity of asperities
	Basis	Specific trace element	Content (ppm)		The homogeneity of asperities	Embodiment 19 embodiment 20 embodiment 21 embodiment 22 embodiment 23 embodiment 24 embodiment 25 embodiment 26 embodiment 27 embodiment 28 embodiment 29 embodiment 30	Identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1	Li Na K Rb Cs Ca Sr Ba Sc Y Nb Ta	10 10 10 10 10 10 10 10 10 10 10 10	250 250 250 250 250 250 250 250 250 250 250 250	○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Embodiment 31 embodiment 32	Identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1	Mo W	10 10	250 250	○ ○
Embodiment 31 embodiment 32		Mo W	10 10	250 250	○ ○	Embodiment 33 embodiment 34 embodiment 35 embodiment 36 embodiment 37 embodiment 38 embodiment 39 embodiment 40 embodiment 41 embodiment 42 embodiment 43 embodiment 44 embodiment 45 embodiment 46 embodiment 47 embodiment 48 embodiment 49 embodiment 50 embodiment 51 embodiment 52	Identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1 identical with aluminium alloy plate II-1	Tc Re Ru Os Rh Ir Pd Pt Ag Au C Ge P As S Se Te Po Mo does not have	10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 100 -	250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 250 225 275	○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
Comparative example 15 comparative examples 16	Identical with aluminium alloy plate II-9 identical with aluminium alloy plate II-9	Mo does not have	10 -	250 275	× ×				10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 100 -		○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

(embodiment 53)

As aluminium alloy plate, use and to have carried out that evenly heating processing and intermediate annealing obtains after the DC casting, the aluminium alloy plate III-1 (width 1030mm) that forms shown in the table 9 as described belowly handles continuously.

(a) aluminium sheet being used alkaline etching treating apparatus of the present invention shown in Figure 8, is that 26 quality %, aluminium ion concentration are that 6.5 quality %, fluid temperature are that the alkaline etching of spraying under 75 ℃ is handled at naoh concentration, the surperficial 15g/m of dissolving aluminium sheet ²The washing of spraying then.

In addition, in alkaline etching treating apparatus of the present invention shown in Figure 8, cover the overall with covering aluminium sheet of band across aluminium sheet.

(b) with the aqueous solution (aluminium ion that contains 0.5 quality % of the concentration of nitric acid 1 quality % of 30 ℃ of fluid temperatures.) decontamination of spraying handles, then, wash with sprayer.What above-mentioned decontamination was used in handling uses aftermentioned to carry out the discarded liquid of galvanochemistry asperities treatment process with alternating current with nitric acid in aqueous solution of nitric acid as the aqueous solution of main body.

(c) carry out the processing of galvanochemistry asperities continuously with alternating voltage.The electrolytic solution of this moment is the aqueous solution (aluminium ion that contains 0.5 quality % of nitric acid 1 quality %.), fluid temperature is 50 ℃.In the processing of galvanochemistry asperities, current value is 1msec by zero to the time T P that reaches peak value, and the DUTY ratio is 1: 1, and frequency is 60Hz, uses trapezoidal square wave ac, is that polarity carries out with the carbon electrode.Impressed current anode uses ferrite.Current density is the peak value of electric current, is 50A/dm ², electric weight is the electric weight summation of aluminium sheet when being anode, is 270C/dm ²Auxiliary electrode makes the electric current shunting 5% from power supply.The washing of spraying then.

(d) aluminium sheet being used alkaline etching treating apparatus of the present invention shown in Figure 8, is that 26 quality %, aluminium ion concentration are that 6.5 quality %, fluid temperature are that the alkaline etching of spraying under 75 ℃ is handled at naoh concentration, the surperficial 1g/m of dissolving aluminium sheet ²The washing of spraying then.

(e) with the aqueous solution (aluminium ion that contains 0.5 quality % of the sulfuric acid concentration 15 quality % of 30 ℃ of fluid temperatures.) decontamination of spraying handles, then, wash with sprayer.What above-mentioned decontamination was used in handling uses aftermentioned to carry out the discarded liquid of anodized operation with direct current with sulfuric acid in aqueous sulfuric acid as the aqueous solution of main body.

(f) at the aqueous solution (aluminium ion that contains 0.5 quality % of the sulfuric acid concentration 15 quality % of 35 ℃ of fluid temperatures.) in, carry out anodized with DC voltage, making it in current density is 2A/dm ²Down, the amount of anodic oxidation coating is 2.7g/m ²Thereby, obtain support device for lithographic printing plate.

In addition, after various processing and washing, carry out mangle with roll.

(embodiment 54)

As aluminium alloy plate, use and to have carried out that evenly heating processing and intermediate annealing obtains after the DC casting, the aluminium alloy plate III-2 (width 1030mm) that forms shown in the table 9 adopts the method identical with embodiment 53 in addition, obtains support device for lithographic printing plate.

(embodiment 55)

As aluminium alloy plate, use and not carry out that evenly heating processing and intermediate annealing obtains after the DC casting, the aluminium alloy plate III-3 (width 1030mm) that forms shown in the table 9 adopts the method identical with embodiment 53 in addition, obtains support device for lithographic printing plate.

(embodiment 56)

Carry out following operation (g) to replace above-mentioned operation (a), carry out following operation (h), adopt the method identical in addition, obtain support device for lithographic printing plate with embodiment 55 to replace above-mentioned operation (d).

(g) aluminium sheet being used alkaline etching treating apparatus of the present invention shown in Figure 9, is that 26 quality %, aluminium ion concentration are that 6.5 quality %, fluid temperature are that the alkaline etching of spraying under 75 ℃ is handled at naoh concentration, the surperficial 15g/m of dissolving aluminium sheet ²The washing of spraying then.

In addition, in alkaline etching treating apparatus of the present invention shown in Figure 9, cover the overall with covering aluminium sheet of cylinder across aluminium sheet.

(h) aluminium sheet being used alkaline etching treating apparatus of the present invention shown in Figure 9, is that 26 quality %, aluminium ion concentration are that 6.5 quality %, fluid temperature are that the alkaline etching of spraying under 75 ℃ is handled at naoh concentration, the surperficial 1g/m of dissolving aluminium sheet ²The washing of spraying then.

(embodiment 57)

Carry out following operation (i) to replace above-mentioned operation (a), carry out following operation (j), adopt the method identical in addition, obtain support device for lithographic printing plate with embodiment 55 to replace above-mentioned operation (d).

(i) aluminium sheet being used alkaline etching treating apparatus of the present invention shown in Figure 10, is that 26 quality %, aluminium ion concentration are that 6.5 quality %, fluid temperature are that the alkaline etching that contacts under 75 ℃ is handled at naoh concentration, the surperficial 15g/m of dissolving aluminium sheet ²The washing of spraying then.

In addition, in alkaline etching treating apparatus of the present invention shown in Figure 10, groove is total length 15m, the rectangle of wide 102cm.

(j) aluminium sheet being used alkaline etching treating apparatus of the present invention shown in Figure 10, is that 26 quality %, aluminium ion concentration are that 6.5 quality %, fluid temperature are that the alkaline etching that contacts under 75 ℃ is handled at naoh concentration, the surperficial 1g/m of dissolving aluminium sheet ²The washing of spraying then.

(embodiment 58)

Carry out following operation (k) to replace above-mentioned operation (a), carry out following operation (l), adopt the method identical in addition, obtain support device for lithographic printing plate with embodiment 55 to replace above-mentioned operation (d).

(k) aluminium sheet being used alkaline etching treating apparatus of the present invention shown in Figure 11, is that 26 quality %, aluminium ion concentration are that 6.5 quality %, fluid temperature are that the alkaline etching of spraying under 75 ℃ is handled at naoh concentration, the surperficial 15g/m of dissolving aluminium sheet ²The washing of spraying then.

In addition, in alkaline etching treating apparatus of the present invention shown in Figure 11, the washing sprayer scatters water across the overall with of aluminium sheet.

(l) aluminium sheet being used alkaline etching treating apparatus of the present invention shown in Figure 11, is that 26 quality %, aluminium ion concentration are that 6.5 quality %, fluid temperature are that the alkaline etching of spraying under 75 ℃ is handled at naoh concentration, the surperficial 1g/m of dissolving aluminium sheet ²The washing of spraying then.

(embodiment 59)

As aluminium alloy plate, use by continuous casting to obtain, the aluminium alloy plate III-4 (width 1030mm) that forms shown in the table 9 adopts the method identical with embodiment 53 in addition, obtains support device for lithographic printing plate.

(comparative example 17～20)

Carry out following operation (m) to replace above-mentioned operation (a), carry out following operation (n), adopt the method identical in addition respectively, obtain support device for lithographic printing plate with embodiment 53,54,55 and 59 to replace above-mentioned operation (d).

(m) aluminium sheet being used alkaline etching treating apparatus in the past shown in Figure 1, is that 26 quality %, aluminium ion concentration are that 6.5 quality %, fluid temperature are that the alkaline etching of spraying under 75 ℃ is handled at naoh concentration, the surperficial 15g/m of dissolving aluminium sheet ²The washing of spraying then.

(n) aluminium sheet being used alkaline etching treating apparatus in the past shown in Figure 1, is that 26 quality %, aluminium ion concentration are that 6.5 quality %, fluid temperature are that the alkaline etching of spraying under 75 ℃ is handled at naoh concentration, the surperficial 1g/m of dissolving aluminium sheet ²The washing of spraying then.

Table 9

Aluminium alloy plate	Cu(％)	Si(％)	Fe(％)	Mn(％)	Mg(％)	Zn(％)	Cr(％)	Ti(％)	Al(％)
Aluminium alloy plate	Cu(％)	Si(％)	Fe(％)	Mn(％)	Mg(％)	Zn(％)	Cr(％)	Ti(％)	Al(％)	III-1	0.016	0.056	0.313	0.005	0.012	0.003	-	0.027	Surplus
III-2	0.067	0.222	0.446	0.966	0.255	0.014	0.0003	0.023	Surplus	III-1	0.016	0.056	0.313	0.005	0.012	0.003	-	0.027	Surplus
III-2	0.067	0.222	0.446	0.966	0.255	0.014	0.0003	0.023	Surplus	III-3	0.016	0.06	0.31	＜0.01	0.014	＜0.01	-	0.032	Surplus
III-4	0.016	0.059	0.31	0.005	0.01	0.005	-	0.025	Surplus	III-3	0.016	0.06	0.31	＜0.01	0.014	＜0.01	-	0.032	Surplus

2, the mensuration of the etch quantity of reverse side

Gummy adhesive tape is pasted on 2 relative limits of test film (with the aluminium sheet identical materials of using in each embodiment and the comparative example) in 100mm * 200mm size, make it to expose by test film, be positioned at the reverse side (limit of the 100mm of test film and the parallel longitudinal of web) of the aluminium sheet (web) of wide 1030mm, make the bonding plane of gummy adhesive tape become upside.Then paste other gummy adhesive tape on the gummy adhesive tape that is exposed by test film, make bonding plane become downside, the remainder that will expose sticks on the reverse side of aluminium sheet.

Use the aluminium sheet pasted test film like this, adopt the method identical to carry out alkaline etching and handle, by the etch quantity that calculates reverse side of poor quality of the test film of handling front and back with embodiment 53～59 and comparative example 17～20.

3, the ocular estimate of reverse side

With the naked eye estimate the outward appearance of the reverse side of the support device for lithographic printing plate that obtains in each embodiment and the comparative example.The evaluation of outward appearance is carried out according to the degree that striped or spot occur, the fully no problem in appearance of them not occurring is zero, problem is serious is *, between them according to striped or spot by few order that begins be followed successively by zero △, △, △ *, zero △ is above to be qualified level.

The ocular estimate result of the etch quantity of reverse side and reverse side is as shown in table 10.

Table 10

	Aluminium alloy plate	The alkaline etching treatment process	Etch quantity (the g/m of reverse side ²)	The ocular estimate of reverse side
	Aluminium alloy plate	The alkaline etching treatment process	Etch quantity (the g/m of reverse side ²)	The ocular estimate of reverse side	Embodiment 53	III-1	Cover the band mode	1.0	○△
Embodiment 54	III-2	Cover the band mode	1.0	○	Embodiment 53	III-1	Cover the band mode	1.0	○△
Embodiment 54	III-2	Cover the band mode	1.0	○	Embodiment 55	III-3	Cover the band mode	1.0	○△
Embodiment 56	III-3	Cover the cylinder mode	0.5	○△	Embodiment 55	III-3	Cover the band mode	1.0	○△
Embodiment 56	III-3	Cover the cylinder mode	0.5	○△	Embodiment 57	III-3	Coating way	0.2	○△
Embodiment 58	III-3	The reverse side water-washing method	1.5	○△	Embodiment 57	III-3	Coating way	0.2	○△
Embodiment 58	III-3	The reverse side water-washing method	1.5	○△	Embodiment 59	III-4	Cover the band mode	1.0	○△
Comparative example 17	III-1	Mode in the past	4.0	○△	Embodiment 59	III-4	Cover the band mode	1.0	○△
Comparative example 17	III-1	Mode in the past	4.0	○△	Comparative example 18	III-2	Mode in the past	4.0	○
Comparative example 19	III-3	Mode in the past	3.0	×	Comparative example 18	III-2	Mode in the past	4.0	○
Comparative example 19	III-3	Mode in the past	3.0	×	Comparative example 20	III-4	Mode in the past	3.0	×

As can be seen, the manufacture method of support device for lithographic printing plate of the present invention is because the etch quantity of reverse side is at 1.5g/m ²Below, therefore in the occasion of using any aluminium sheet, the outward appearance of the reverse side of support device for lithographic printing plate also is good (embodiment 53～59).

With respect to this, the manufacture method of support device for lithographic printing plate in the past, the occasion (comparative example 19) of the aluminium sheet that after using the DC casting, does not carry out evenly heating processing and intermediate annealing and obtain, perhaps use the occasion (comparative example 20) of the aluminium sheet that obtains by continuous casting, striped or spot occur at the reverse side of support device for lithographic printing plate.In addition, in comparative example 17 and the comparative example 18, problems such as striped or spot do not occur, but the liquid failure degree is big, and the thickness of aluminium sheet reduces significantly.

(embodiment 60～63 and comparative example 21～24)

IV-1. the manufacturing of original edition of lithographic printing plate

The DC Birmasil behind its ingot bar of building up by welding, carries out heat treated, all thermal treatment, hot rolling, cold rolling, intermediate annealing, cold rolling and correct successively, obtains aluminium sheet.Wherein, by the section configuration of change aluminium sheet and the degree of rectification, obtain various aluminium sheets.

For the aluminium sheet that obtains, with the sodium hydrate aqueous solution of the about 25 quality % of concentration chemical etching is carried out on the surface and handled, make meltage reach about 5g/m ², after the washing, carry out decontamination with aqueous hydrochloric acid solution and handle.After the washing, in aqueous hydrochloric acid solution, carry out alternating current electrolysis, carry out the processing of galvanochemistry asperities, the total electric weight when making the Al anode reaches 400C/dm ²After the washing, slightly carry out chemical etching, after the washing, carry out decontamination with aqueous sulfuric acid and handle with the dilute sodium hydroxide aqueous solution of about 5 quality of concentration.And after washing, in the aqueous sulfuric acid of the about 15 quality % of concentration, carry out dc electrolysis, and form anodic oxidation coating, make the tunicle amount reach 2g/m ², obtain support device for lithographic printing plate.

And, apply emulsion and carry out drying, make dried thickness reach 1.5 μ m, form positive type photographic layer, make the surface adsorption surface layer, obtain original edition of lithographic printing plate.

With the above-mentioned various original edition of lithographic printing plate that obtain with the cylinder leveller correct curl after, cut off with slitting shears and shearer, make the rectangle section of size shown in the table 11 (length of plate rolling direction and with plate rolling direction vertical direction wide).

IV-2. the mensuration of lug boss

Above-mentioned each section that obtains is placed on the platform,, measure maximum height, number and the height summation of lug boss for perpendicular to each limit of plate rolling direction and each limit that is parallel to plate rolling direction.

The maximum height of lug boss, number and total are highly as shown in table 11 on each limit.

IV-3. the evaluation of carrying property

With each section of travelling belt carrying, carrying property is estimated in having or not of generation of sliding during according to carrying and swing.

The evaluation result of carrying property is as shown in table 12.In addition, do not slide and the occasion of swinging is zero, slightly take place but occasion in allowed band is △, frequently take place occasion for *, zero and △ between be zero △, △ and * between be △ *.

IV-4. the evaluation of printing machine installation property

Each section is installed on the printing machine, estimates printing machine installation property.

The evaluation result of printing machine installation property is as shown in table 12.In addition, be zero in the time of can installing without a doubt, in the time of must reinstalling △, in the time of can not installing be *.

By table 11 and table 12 as can be known, that property is installed is good for original edition of lithographic printing plate of the present invention (embodiment 60～63) carrying property and printing.

Relative therewith, when placing on the platform perpendicular to each limit of plate rolling direction and each limit that is parallel to plate rolling direction, the maximum height of lug boss, number and add up in the height any one when excessive (comparative example 21～24), carrying property and printing machine are installed in the property at least a very poor.

Table 11

	The size of section		Lug boss
			Lug boss						Limit perpendicular to plate rolling direction			The limit that is parallel to plate rolling direction
			Width (mm)	Length (mm)	Maximum height (mm)	Number (individual)	Add up to height (mm)	Maximum height (mm)	Limit perpendicular to plate rolling direction			The limit that is parallel to plate rolling direction			Number (individual)	Add up to height (mm)
	Embodiment 60 embodiment 61 embodiment 62 embodiment 63	1030 1030 1470 810	Width (mm)	Length (mm)	Maximum height (mm)	Number (individual)	Add up to height (mm)	Maximum height (mm)	800 1950 1950 1000	1.5 1.5 1.8 1.2	2.5 2.0 3.0 2.5	2.5 2.6 3.8 2.1	1.0 1.5 1.5 1.2	1.0 3.0 3.0 2.5	Number (individual)	Add up to height (mm)	1.0 2.7 2.8 2.0
Comparative example 21 comparative examples 22 comparative examples 23 comparative examples 24	Embodiment 60 embodiment 61 embodiment 62 embodiment 63	1030 1030 1470 810	1030 1030 1030 1470	800 800 1950 1950	2.2 1.8 1.5 2.5	2.5 3.5 3.5 4.0	4.1 4.5 3.0 6.9	1.0 1.0 1.9 2.0	800 1950 1950 1000	1.5 1.5 1.8 1.2	2.5 2.0 3.0 2.5	2.5 2.6 3.8 2.1	1.0 1.5 1.5 1.2	1.0 3.0 3.0 2.5	1.5 1.5 6.0 6.0	1.0 1.0 7.8 10.5	1.0 2.7 2.8 2.0

Table 12

	Carrying property	Printing machine installation property
	Carrying property	Printing machine installation property	Embodiment 60 embodiment 61 embodiment 62 embodiment 63	○ ○△ △ ○△	○ ○ ○ ○
Comparative example 21 comparative examples 22 comparative examples 23 comparative examples 24	× × △ ×	△ △ × ×	Embodiment 60 embodiment 61 embodiment 62 embodiment 63	○ ○△ △ ○△	○ ○ ○ ○

(embodiment 64～69 and comparative example 25～28)

V-1. the manufacturing of original edition of lithographic printing plate

In the cold rolling process when making aluminium sheet, copy to the reverse side of aluminium sheet by pattern with rolling cylinder, the surface roughness that makes reverse side is different on plate rolling direction and vertical therewith direction, and in the galvanochemistry asperities processing when making support device for lithographic printing plate, remove by the back side of line of electric force and twine, with the width shown in the table 13, the both ends (limit that is parallel to plate rolling direction) of reverse side are implemented beyond the slight asperities processing, method according to same with embodiment 60～63 and comparative example 21～24 obtains the section of planographic printing plate master.In addition, the size of embodiment 64～69 sections and maximum height, number and the total height of lug boss are same with embodiment 62, and the size of comparative example 25～28 sections and maximum height, number and the total height of lug boss are same with comparative example 24.

V-2. the mensuration of the surface roughness of reverse side

For each section, use surface roughness meter (Suphcom, the accurate society in Tokyo system), be that 0.8mm, evaluation length are to measure the plate rolling direction of original edition of lithographic printing plate reverse side and the surface roughness R of vertical direction therewith under the condition of 4mm in the cut-out value _a(the arithmetic mean rugosity R of JIS B0601-1994 regulation _a).

Surface roughness R with the big direction of surface roughness _aBe R _Al, with the surface roughness R of the little direction of surface roughness _aBe R _As, with R _Al/ R _AsValue together list in the table 13.

V-3. the evaluation of carrying property

The carrying of each section of evaluation same as described above.The evaluation result of carrying property is as shown in table 13.

By table 12 and table 13 as can be known, in original edition of lithographic printing plate of the present invention, the surface roughness of reverse side is different on plate rolling direction and vertical therewith direction, and R _Al/ R _AsIn the time of within the specific limits (embodiment 64～69), with the surface roughness of reverse side on plate rolling direction and vertical therewith direction not not simultaneously (embodiment 62) compare, carrying property is better.Wherein, when with certain width the asperities processing being carried out in the end of reverse side (embodiment 68 and 69), carrying property is good especially.

Relative therewith, the occasion in specialized range (comparative example 25～28) not such as the maximum height of lug boss when placing on the platform, even the surface roughness of reverse side is different on plate rolling direction and vertical therewith direction, and R _Al/ R _AsWithin the specific limits, can not say that carrying property is very desirable.

Table 13

	R _al	R _as	R _al/R _as	The width (mm) of the asperities processing of reverse side	Carrying property
	R _al	R _as	R _al/R _as	The width (mm) of the asperities processing of reverse side	Carrying property	Embodiment 64 embodiment 65 embodiment 66 embodiment 67	0.19 0.40 0.40 0.30	0.17 0.35 0.21 0.18	1.12 1.14 1.90 1.67	0.5 0.5 0.5 0.5	○△ ○△ ○ ○
Comparative example 25 comparative examples 26 comparative examples 27 comparative examples 28	0.19 0.41 0.41 0.30	0.17 0.34 0.20 0.19	1.12 1.21 2.05 1.58	0.5 0.5 0.5 0.5	△× △× △× △×	Embodiment 64 embodiment 65 embodiment 66 embodiment 67	0.19 0.40 0.40 0.30	0.17 0.35 0.21 0.18	1.12 1.14 1.90 1.67	0.5 0.5 0.5 0.5	○△ ○△ ○ ○
	0.19 0.41 0.41 0.30	0.17 0.34 0.20 0.19	1.12 1.21 2.05 1.58	0.5 0.5 0.5 0.5	△× △× △× △×	Embodiment 68 embodiment 69	0.19 0.19	0.17 0.17	1.12 1.12	10 50	○～○△ ○

(embodiment 70～73 and comparative example 29～34)

VI-1. the manufacturing of original edition of lithographic printing plate

In the cold rolling process when making aluminium sheet, remove the reprogramming table, make the coefficient of thermal expansion of removing behind the photographic layer with the coefficient of thermal expansion of plate rolling direction vertical direction and plate rolling direction different, and the length that the size that makes section reaches plate rolling direction is 800mm, with the width of plate rolling direction vertical direction be beyond the 1030mm, method according to same with embodiment 60～63 and comparative example 21～24 obtains the section of planographic printing plate master.In addition, when embodiment 70～73 places on the platform maximum height of lug boss etc. all within the scope of the invention, comparative example 29～34 is not within the scope of the invention.

VI-2. remove the mensuration of coefficient of thermal expansion behind the photographic layer

After using imaging liquid to remove the photographic layer of each section, use TMA (Thremo MechanicalAnalyzer) to measure and the coefficient of thermal expansion of plate rolling direction vertical direction and the coefficient of thermal expansion of plate rolling direction.

The measurement result of coefficient of thermal expansion is as shown in table 14.

VI-3. the mensuration of lug boss after the heat treated

With 270 ℃ baking ovens with each section heating 7 minutes after, put coldly, place on the platform, measure maximum height, the number of 4 limit protrusions portions respectively and add up to height.

The maximum height of the lug boss on every limit, number and total are highly as shown in table 14 after the heat treated.

VI-4. have or not the generation of wrinkle during heat treated

Clip surface and reverse side with travelling belt, with each section of 1.5m/ minute speed carrying, in carrying by 150 ℃ well heater (heating part length is 0.3mm) heating, put cold after, observation has or not the generation of wrinkle.

The wrinkle that has or not heat treated to cause produces as shown in table 14.

As shown in Table 14, remove behind the photographic layer with the coefficient of thermal expansion of plate rolling direction vertical direction within the specific limits, and the maximum height etc. that is easy to make lug boss after the heat treated for 80～98% original edition of lithographic printing plate of the present invention (embodiment 70～73) of the coefficient of thermal expansion of plate rolling direction reaches the scope of regulation, can be owing to heat treated produces wrinkle.

Table 14

	Coefficient of thermal expansion (* 10 ^-5)			Lug boss after the heat treated			The generation of wrinkle
	Coefficient of thermal expansion (* 10 ^-5)			Lug boss after the heat treated				The direction vertical (A) with plate rolling direction	Plate rolling direction (B)	A/B×100(％)	Maximum height (mm)	Number (individual)	Add up to height (mm)
	Embodiment 70 embodiment 71 embodiment 72 embodiment 73	2 1.4 2.5 2.1	2.4 1.7 2.9 2.3	83.3 82.4 86.2 91.3	1.0 1.2 1.5 1.8	2 2 2 3		The direction vertical (A) with plate rolling direction	Plate rolling direction (B)	A/B×100(％)	Maximum height (mm)	Number (individual)	Add up to height (mm)	1.8 2.0 2.1 3.0	Do not have
Comparative example 29 comparative examples 30 comparative examples 31 comparative examples 32 comparative examples 33 comparative examples 34	Embodiment 70 embodiment 71 embodiment 72 embodiment 73	2 1.4 2.5 2.1	2.4 1.7 2.9 2.3	83.3 82.4 86.2 91.3	1.0 1.2 1.5 1.8	2 2 2 3	1.8 1.9 2.6 2 2 2	2.3 1.8 2.8 2.4 2.4 2.4	78.3 105.6 92.9 83.3 83.3 83.3	1.0 1.2 1.5 3.5 1.8 2	2 3 3 3 5 4	1.7 2.9 4.0 4.8 5 5.5	Having or not does not have	1.8 2.0 2.1 3.0	Do not have

(embodiment 74～79 and comparative example 35)

VII-1. the manufacturing of original edition of lithographic printing plate

Remove by changing the condition of cold rolling and intermediate annealing when making aluminium sheet, change the Sven-Gan Eriksson value, and the length that the size that makes section reaches plate rolling direction is 800mm, with the width of plate rolling direction vertical direction be beyond the 1030mm, method according to same with embodiment 60～63 and comparative example 21～24 obtains the section of planographic printing plate master.In addition, when embodiment 74～79 places on the platform maximum height of lug boss etc. all within the scope of the invention, comparative example 35 is not within the scope of the invention.

VII-2. remove the mensuration of Sven-Gan Eriksson value behind the photographic layer

For each section, remove photographic layer by the video picture processing, (90mm * 90mm), adopt Erichsen test B method measures the Sven-Gan Eriksson value to use No. 2 test specimens according to the method for JIS Z2247 regulation.

It is as shown in Table 15 to remove behind the photographic layer measurement result of Sven-Gan Eriksson value.

VII-3. observe the generation that has or not large-scale burr

For each section, when original edition of lithographic printing plate is made section, observe with slitting shears and cut off the generation that has or not large-scale burr on the limit that is parallel to plate rolling direction that obtains.

Have or not the generation of large-scale burr as shown in Table 15.In addition, be zero when not producing large-scale burr, produce a part but in practicality, be zero △ when no problem, produce burr but be △ in allowed band the time, during existing problems be *.

VII-4. the evaluation of printing machine installation property

The evaluation result of printing machine installation property is as shown in Table 15.In addition, be zero in the time of can installing without a doubt, in the time of must reinstalling △, in the time of can not installing be *.

As shown in Table 15, remove that there is not the problem that large-scale burr cause that produces in Sven-Gan Eriksson value original edition of lithographic printing plate of the present invention (embodiment 74～79) within the specific limits behind the photographic layer, it is also good that printing machine is installed property in addition.

Table 15

	The Sven-Gan Eriksson value	Large-scale burr	Printing machine installation property
	The Sven-Gan Eriksson value	Large-scale burr	Printing machine installation property	Embodiment 74 embodiment 75 embodiment 76 embodiment 77 embodiment 78 embodiment 79	9.5 7.0 5.9 4.1 2.0 1.8	△ ○△ ○ ○ ○ ○	△ ○ ○ ○ ○ ○
Comparative example 35	11.0	×	×		9.5 7.0 5.9 4.1 2.0 1.8	△ ○△ ○ ○ ○ ○	△ ○ ○ ○ ○ ○

Original edition of lithographic printing plate carrying property of the present invention and printing machine installation property are all good.

Claims

1, a kind of support device for lithographic printing plate, be to obtain by the asperities processing that aluminium alloy plate is comprised the processing of galvanochemistry asperities, above-mentioned aluminium alloy plate contains Fe 0.05～0.5 quality %, Si 0.03～0.2 quality %, remainder is made up of unavoidable impurities and Al, it is characterized in that, the mass ratio of Fe content and Si content is 1.5～10, and being positioned at surface to the degree of depth is wide average out to 20～200 μ m of the crystal grain in 20 μ m zones, length average out to 40～3000 μ m.

2, support device for lithographic printing plate as claimed in claim 1 is characterized in that, contains Fe 0.1～0.5 quality % in the described aluminium alloy plate.

3, support device for lithographic printing plate according to claim 1, be to obtain by the asperities processing that aluminium alloy plate is comprised the processing of galvanochemistry asperities, above-mentioned aluminium alloy plate contains Fe 0.05～0.5 quality %, Si 0.03～0.15 quality %, remainder is made up of Al and unavoidable impurities, it is characterized in that, in this aluminium alloy plate, also contain Cu 0.003～0.03 quality %, Ti0.001～0.040 quality %, be that Cu content in the zone of 2 μ m is that the Cu content in zone more than the 2 μ m manys more than the 20ppm than the degree of depth by the surface to the degree of depth, and Cu content, Si content and Ti content satisfy the relation of following formula (1)

1≤(Cu content+Si content)/Ti content≤30 (1)

4, support device for lithographic printing plate as claimed in claim 3, it is characterized in that, above-mentioned aluminium alloy plate also contains Mg 0.001～0.3 quality %, and the element 1～100ppm that contains at least a Li of being selected from, Na, K, Rb, Cs, Ca, Sr, Ba, Sc, Y, Nb, Ta, Mo, W, Tc, Re, Ru, Os, Co, Rh, Ir, Pd, Pt, Ag, Au, C, Ge, P, As, S, Se, Te and Po, the purity of the Al of above-mentioned aluminium alloy plate is more than 99 quality %.

5, as claim 3 or 4 described support device for lithographic printing plate, it is characterized in that, to the degree of depth zone of 10 μ m by the surface, between the FeSi metalloid unit area of compound exist rate below 0.5%, and exist rate below 0.5% based on the unit area of separating out product or crystallized product of Si.

6, a kind of manufacture method of support device for lithographic printing plate, be by carry out successively DC casting, building up by welding, heat treated, hot rolling, intermediate annealing, cold rolling and proofread and correct make above-mentioned aluminium alloy plate after, comprise the asperities processing of galvanochemistry asperities processing, obtain the manufacture method of the support device for lithographic printing plate of the described support device for lithographic printing plate of claim 1～5, it is characterized in that the mode that adopts continuously the carrying aluminium alloy plate to heat is simultaneously carried out this intermediate annealing.

7, the manufacture method of support device for lithographic printing plate as claimed in claim 6 is characterized in that, also has the alkaline etching operation, and the etch quantity of reverse side is at 1.5g/m ²Below.

8, a kind of original edition of lithographic printing plate, be the described support device for lithographic printing plate of claim 1～5 to be carried out emulsion apply the original edition of lithographic printing plate that obtains with drying, wherein, the length of making plate rolling direction is 600～2000mm, with plate rolling direction vertical direction wide be the rectangle section of 800～1500mm, when placing on the platform, on each limit vertical with plate rolling direction, the maximum height of lug boss is below the 2mm, the number of lug boss is below 3, the total of lug boss highly is below the 4mm, on each limit parallel with plate rolling direction, the maximum height of lug boss is below the 1.5mm, the number of lug boss is below 3, and the total of lug boss highly is below the 3mm.

9, original edition of lithographic printing plate as claimed in claim 8, wherein, the surface roughness of reverse side is different on plate rolling direction and perpendicular direction, and, the surface roughness R of the direction that surface roughness is big _aBe R _Al, direction that surface roughness is little surface roughness R _aBe R _AsThe time, R _Al/ R _AsValue be 1.1～5.0.

10, original edition of lithographic printing plate as claimed in claim 8 or 9, wherein, at least one carries out slight asperities processing by the end of edge to 1～50mm to reverse side.

11, original edition of lithographic printing plate as claimed in claim 8, the coefficient of thermal expansion of the direction vertical with the plate rolling direction after removing photographic layer is 1.0 * 10 ^-5～2.5 * 10 ^-5, be plate rolling direction coefficient of thermal expansion 80～98%,

After making in length and breadth length and being the rectangle section of 500～1000mm, under 80～270 ℃, carry out heat treated, put cold when placing on the platform again, respectively on 4 limits, the maximum height of lug boss is below the 3mm, and the number of lug boss is below 4, and the total of lug boss highly is below the 5mm.

12, original edition of lithographic printing plate as claimed in claim 8, wherein, the Sven-Gan Eriksson value of removing behind the photographic layer is 2～10.