US3733200A - Printing plate - Google Patents

Printing plate Download PDF

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Publication number
US3733200A
US3733200A US00114887A US3733200DA US3733200A US 3733200 A US3733200 A US 3733200A US 00114887 A US00114887 A US 00114887A US 3733200D A US3733200D A US 3733200DA US 3733200 A US3733200 A US 3733200A
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United States
Prior art keywords
methacrylate
printing
acrylate
hydrophilic
plate
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Expired - Lifetime
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US00114887A
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English (en)
Inventor
S Takaishi
A Kato
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Kansai Paint Co Ltd
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Kansai Paint Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/03—Chemical or electrical pretreatment
    • B41N3/036—Chemical or electrical pretreatment characterised by the presence of a polymeric hydrophilic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1008—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
    • B41C1/1016—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials characterised by structural details, e.g. protective layers, backcoat layers or several imaging layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2201/00—Location, type or constituents of the non-imaging layers in lithographic printing formes
    • B41C2201/04—Intermediate layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2201/00—Location, type or constituents of the non-imaging layers in lithographic printing formes
    • B41C2201/14—Location, type or constituents of the non-imaging layers in lithographic printing formes characterised by macromolecular organic compounds, e.g. binder, adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
    • B41C2210/04—Negative working, i.e. the non-exposed (non-imaged) areas are removed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
    • B41C2210/06—Developable by an alkaline solution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
    • B41C2210/24—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation characterised by a macromolecular compound or binder obtained by reactions involving carbon-to-carbon unsaturated bonds, e.g. acrylics, vinyl polymers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/151—Matting or other surface reflectivity altering material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/155—Nonresinous additive to promote interlayer adhesion in element

Definitions

  • a printing plate is constituted a basic plate, a layer of water insoluble hydrophilic acrylate or methacrylate polymers over the plate and a photo-sensitive layer over the layer.
  • the present invention relates to a printing plate. More particularly, it relates to a printing plate having a photosensitive layer on the surface of water insoluble hydro philic acrylic resins layer.
  • the most conventional printing plates are aluminium plates having sanded or chemically treated surface on which e.g. gelatin, polyvinyl alcohol or albumins are applied together with one of photosensitive materials such as chromates and diazo compounds and finally those plates are dried, and exposed through a negative photo-film over the plate, developed and treated again.
  • the photo-sensitively cured parts of lines and pictures absorb ink well due to the lipophilic property.
  • the surface of the aluminium plate exposed by developing absorbs water and repels ink.
  • the exposed surface of the aluminium plate gradually wears thin by eternal friction together with cured parts and lines. In some cases, worn out lines and pictures are fixed and reinforced by lacquerlike materials.
  • the surface of the aluminium plate especially its sanded surface tends to wear out sometimes more easily than the photo-sensitive cured layer.
  • the defaced plate results in indistinct pictures with less hydrophilic function, and finally it becomes impossible to print.
  • water supply to the sanded aluminium surface has to be appropriate in order to obtain clear pictures and skilled work is required to the adjustment of water supply.
  • An object of the present invention is to provide a novel printing plate.
  • Another object of the present invention is to provide a printing plate having an extremely great printing durability.
  • a further object of the present invention is to provide an improved starting printing plate bringing about a simplification of the make-up operation.
  • the printing plate according to the present invention comprises a basic plate, a layer of water insoluble hydro philic acrylate or methacrylate polymers (hydrophilic acrylic resins) over the plate and a photo-sensitive layer over the layer.
  • metallic plates such as steel plate, tin plate, zinc plate, stainless steel plate, etc.
  • plastic sheets such as polyethylene terephthalate sheet, polystyrene sheet, acetyl cellulose sheet, hydrophilic acrylic resin sheets, etc. and papers.
  • hydrophilic acrylic resins which form hydrophilic layers are water insoluble.
  • hydrophilic acrylic resins should be capable of absorbing at least 20% of its weight of water and preferably do not absorb more than about of its weight of water.
  • the hydrophilic monomer employed in the hydrophilic acrylic resins is a hydroxy lower alkyl acrylate or methacrylate or hydroxy lower alkoxy lower alkyl acrylate or methacrylate, e.g. 2-hydroxyethyl acrylate, 2- hydroxyethyl methacrylate, diethylene glycol monoacrylate, diethylene glycol monomethacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, 3-hydroxypropyl acrylate, 3-hydroxypropyl methacrylate, dipropylene glycol monomethacrylate and dipropylene glycol monoacrylate.
  • the most preferred monomers are the hydroxyalkyl acrylates and methacrylates, particularly Z-hydroxyethyl methacrylate.
  • polymers of acrylamide, methacrylamide, N-alkyl substituted acrylamide and methacrylamide such as N-propylacrylamide, N -isopropyl acrylamide, N-isopropyl methacrylamide, N-propyl methacrylamide, N-butyl acrylamide, N-methyl acrylamide and N-methyl methacrylamide, diacetone acrylamide, N-(2-hydroxyethyl) acrylamide and N- (Z-hydroxyethyl) methacrylamide.
  • copolymers of these monomers with each other or with other copolymerizable monomers.
  • the hydrophilic monomer gives a product which is water soluble, e.g. polyacrylamide
  • the copolymerizable monomer can be used in an amount of 0.05 to 50%.
  • comonomers include methyl acrylate, ethyl acrylate, isopropyl acrylate, propyl acrylate, butyl acrylate, sec.
  • butyl acrylate pentyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, isopropyl methacrylate, butyl methacrylate, sec. butyl methacrylate, pentyl methacrylate, lower alkoxyethyl acrylates and methacrylates, e.g.
  • methoxyethyl acrylate methoxyethyl methacrylate, ethoxyethyl acrylate and ethoxyethyl methacrylate, triethylene glycol acrylate, triethylene glycol methacrylate, glycerol monoacrylate and glycerol monomethacrylate.
  • unsaturated amines p-aminostyrene, oaminostyrene, 2-amino 4 vinyltoluene, alkylamino alkyl acrylates and methacrylates, e.g.
  • the cross-linking agent is present in an amount of 0.1 to 2.5%, most preferably not over 2.0%, although from 0.05 to 15% or even 20%, of crosslinking agents can be used.
  • cross-linking agents include ethylene glycol diacrylate, ethylene glycol dimethacrylate, 1,2- butylene glycol dimethacrylate, 1,3-butylene glycol dimethacrylate, 1,4-butylene glycol dimethacrylate, propyl ene glycol diacrylate, propylene glycol dimethacrylate, diethylene glycol dimethacrylate, di-propylene glycol dimethacrylate, diethylene glycol diacrylate, dipropylene glycol diacrylate, divinyl benzene, divinyl toluene, diallyl tartarate, allyl pyruvate, allyl maleate, divinyl tartrate, triallyl melamine, N,N' methylene bis acrylamide, .glycerine trimethacrylate, diallyl maleate, divinyl ether, diallyl monoethylene glycol citrate, ethylene glycol vinyl allyl citrate, allyl vinyl maleate, diallyl itacon
  • polyallyl sucrose e.g. pentaallyl sucrose, sucrose diacrylate, glucose dimethacrylate, pentaerythritol tetraacrylate, sorbitol dimethacrylate, diallyl aconitate, divinyl citraconate, diallyl fumarate.
  • ethylenically unsaturated acids or salts thereof such as acrylic acid, cinnamic acid, crotonic acid, methacrylic acid, itaconic acid, aconitic acid, maleic acid, fumaric acid, mesaconic acid and citraconic acid.
  • partial esters such as mono 2-hydroxypropyl itaconate, mono 2-hydroxyethyl itaconate, mono Z-hydroxyethyl citraconate, mono 2-hydroxypropyl aconitate, mono 2-hydroxyethyl maleate, mono 2-hydroxypropyl fumarate, monomethyl itaconate, monoethyl itaconate, mono methyl Cellosolve ester of itaconic acid (methyl Cellosolve is the monomethyl ether of diethylene glycol), mono methyl Cellosolve ester of maleic acid.
  • partial esters such as mono 2-hydroxypropyl itaconate, mono 2-hydroxyethyl itaconate, mono Z-hydroxyethyl citraconate, mono 2-hydroxypropyl aconitate, mono 2-hydroxyethyl maleate, mono 2-hydroxypropyl fumarate, monomethyl itaconate, monoethyl itaconate, mono methyl Cellosolve ester of itaconic acid (methyl Cellosolve is the monomethyl ether
  • the polymers can be prepared as casting syrups, as aqueous dispersions, by aqueous suspension polymerization or as solutions in organic solvents such as ethyl alcohol, methyl alcohol, propyl alcohol, isopropyl alcohol, formamide, dimethyl sulfoxide or other appropriate solvent.
  • organic solvents such as ethyl alcohol, methyl alcohol, propyl alcohol, isopropyl alcohol, formamide, dimethyl sulfoxide or other appropriate solvent.
  • Polymerization can be carried out at 20 to 150 C., frequently 35 to 90 C. and can be completed after applying.
  • the polymerization can be carried out employing a free radical catalyst in the range of 0.05 to 1% of the polymerizable monomers.
  • Typical catalyst include tbutyl peroctoate, benozyl peroxide, isopropyl percarbonate, 2,4-dichlorobenzoyl peroxide, methyl ethyl ketone peroxide, cumene hydroperoxide and dicumyl peroxide.
  • Irradiation e.g. by ultraviolet light or gamma rays, also can be employed to catalyze the polymerization.
  • the hydrophilic polymer is used as a solution, as a casting syrup or as a sheet, coated on the surface of basic plate by means of painting, casting, adhering and the like with or without using adhesives, and forms a water insoluble hydrophilic resin layer.
  • the thickness of the hydrophilic resin layer is generally 5 to 300 microns, preferably 10 to 50 microns.
  • hydrophilic resin there can be incorporated with the hydrophilic resin to provide a layer having increased mechanical strength as well as adherence to the basic plate by oxidizing type curing agents such as sodium, potassium or ammonium chromate or dichromate, aminoplast resins such as melamine resin, benzoguanamine resin or acetoguanamine resin, acid anhydrides such as maleic anhydride, citraconic anhydride, succinic anhydride, phthalic anhydride, trimellitic anhydride, pyromellitic anhydride and the like, polyamines such as ethylene diamine, propylene diamine, diethylene triamine, tetraethylene pentamine, piperazine, m-xylylene diamine, p-xylylene diamine, m-phenylene diamine, p-phenylene diamine, benzidine, diaminodiphenyl methane, diaminodiphenyl sulfone, 3,3-dichloro-4,4-diphenyl
  • powdered materials there are fine divided powdered inorganic materials such as, e.g., silica, alumina, magnesia, zirconia, barium sulfate, acid actinated clay, talc and diatomaceous earth.
  • powdered materials there are fine divided powdered inorganic materials such as, e.g., silica, alumina, magnesia, zirconia, barium sulfate, acid actinated clay, talc and diatomaceous earth.
  • Preferable materials are silica and alumina.
  • the amount of the powdered materials to the hydrophilic resin is less than 5% by weight, preferably 0.5 to 2% by weight.
  • photocurable compositions composed of vinyl monomers, photosensitizers and resins such as unsaturated polyester resin, alkyd resin, acrylurethane resin, silicone modified acrylic resin, polybutadiene and cellulose; light-sensitive polymers modified by compounds such as diazo compounds, azide compounds, organo sulfur compounds and cinnamic acid compounds; and compositions composed of dichromates and gelatin, polyvinyl alcohol or albumin. Considering the printing capacity and resolving power, acrylurethane resin is especially superior to the others.
  • the above mentioned polymeric materials are dissolved in organic solvents having the property of swelling or partially dissolving the hydrophilic layer, e.g., alcohols, ketones and esters, and are applied to the surface of the hydrophilic resin layer by coating and drying.
  • organic solvents having the property of swelling or partially dissolving the hydrophilic layer e.g., alcohols, ketones and esters
  • the surface of the hydrophilic resin layer swells or partially dissolves and mixes with photo-sensitive compounds, and both layers are adhered together.
  • printing plate is exposed using a negative film over it, developed, washed by water and dried, and if necessary absorbed in water. Then it is equipped to the otfset printing machine and used in the offset printing. It gives us excellent results.
  • water supply by fountain roller may be extremely little.
  • the printing palte having a photosensitive layer on the hydrophilic resin layer has very excellent advantages in comparison with a conventional printing plate having a photo-sensitive layer on the aluminium plate directly, and is very useful in respect to increasing printing durability and printing precision, and bringing about simple printing operation.
  • FIG. 1 shows a partial sectional view of the printing plate according to the invention.
  • FIG. 2 shows a partial sectional view of the printing plate after exposing and developing.
  • the starting printing plate is constituted of a basic plate 1, a layer 2 of water insoluble hydrophilic acrylic resins over the plate 1 and a photo-sensitive layer 3 over the layer 2.
  • the thickness of the layers 2 and 3 are greatly exaggerated for illustrative purposes.
  • EXAMPLE 1 400 parts of polyethyleneglycol-400 was added to 360 parts of tolylene diisocyanates, reacted by heating at a temperature of 140 C. for 30 minutes and cooled, then there were added 260 parts of 2-hydroxyethyl methacrylate and 0.21 part of p-benzoquinone to the reactant and reacted at a temperature of 40 C. for 24 hours to obtain the unsaturated acrylurethane resin (I).
  • the resin (I) was a very viscous liquid at room temperature.
  • the photosensitive resin composition was obtained by mixing 50 parts of resin (I) with 50 parts of commercial cellulose phthalate, 1 part of benzoin ethylether and 100 parts of acetone.
  • EXAMPLE 2 The solution consisting of 2-hydroxyethyl methacrylate 79.6%, ethyleneglycol dimethacrylate 0.3%, glycerol 20% and diethyl percarbonate 0.1% was poured into the space between two glass plates adjusted by spacer in order to maintain 0.15 mm. of space carefully so as to not form bubbles.
  • the composition was polymerized maintaining a temperature of 65 C. for 20 minutes, then the transparent sheet obtained by removing the plates was washed by distilled water and the glycerol extracted out, and further dried at a room of 40% of relative humidity at a temperature of 25 C. for 24 hours to obtain a hydrophilic resin sheet.
  • the sheet was adhered to the aluminium plate having 0.15 mm. of thickness using epoxy resin polyamide resin mixed adhesive.
  • the other side of the resin sheet was coated uniformly with photo-sensitive resin composition obtained in Example 1 so that the thickness of drying film was about 2 microns, and dried to obtain the printing plate.
  • the plate was set in the vacuum printing frame and exposed by a high pressure mercury lamp at a distance of 35 cm. for one minute, then it was developed by 1% ethanolamine aqueous solution, washed by water and dried to obtain the lithography for printing. Otfset printing was carried out by using the lithography, and very excellent printing effects having good distinction and measure accuracy were obtained. Also it was able to print more than 100,000 sheets of paper per plate, and the control of water supply was easier than that with the conventional method.
  • Example 3 Hydrophilic monomer solution of Example 2 was coated on the aluminium plate having 0.15 mm. of thickness which was previously coated with epoxy resin-polyamide resin mixed primer so as to be 10 microns thickness, so that the thickness of the hydrophilic resin was about 0.2 mm, and polymerized under nitrogen atmosphere by similar condition as Example 2. Then the photography for printing was prepared and offset printing was carried out, similar good results as Example 2 were obtained.
  • EXAMPLE 4 A hydrophilic resin sheet obtained by Example 2 was adhered on the surface of polyethylene terephthalate sheet having 0.2 mm. of thickness by means of epoxy adhesive and the other surface of the resin sheet was coated with diazo compound Fuji Super-Resist: trademark of (Fuji Chemicals Co., Ltd.) as thin as 3 microns, exposed through negative fihn and treated as prescribed to obtain a printing plate. Offset printing with four colors was carried out using the printing plate, and the good results of Example 2 were obtained. Also registering of each plate was carried out easily and rapidly, because of its transparency.
  • EXAMPLE 5 1,000 grams of xylene, grams of 2-hydroxyethyl methacrylate and 0.33 gram of isopropyl percarbonate were charged to a flask equipped with an agitator and heating mantle. The flask was rapidly agitated at 100 C. under a nitrogen atmosphere. After 15 minutes the slurry was filtered hot to isolate the polymer. The polymer powder was reslurried in 300 ml. of xylene, filtered and dried. A 98% yield of 2 to 5 micron particle size alcohol soluble powder was obtained. 100 grams of the polymer powder was dissolved in 200 ml. of methanol, then added 0.2 gram of epoxy resin and 1.5 grams of fine divided silica powder and dispersed homogeneously.
  • the thus obtained solution was coated on epoxy resin-polyamide resin mixed primer coating which was previously coated on a steel plate having a 0.15 mm. thickness so as to be 10 microns thick so that the dried thickness of layer was 20 microns and dried. Then the lithography for printing was prepared and offset printing was carried out, similar good results to those in Example 2 were obtained. Mechanical strength of the hydrophilic resin layer was good.
  • EXAMPLE 6 A casting syrup was made from 100 grams of 2-hydroxyethyl methacrylate, 0.2 gram of ethyleneglycol dimethacrylate and 0.4 gram of t-butyl peroctoate. 0.2 gram of potassium dichromate and 2 grams of fine divided silica powder were added into the syrup and dispersed homogeneously. The syrup was coated on an aluminium plate so that the dried thickness was 25 microns. Then the lithography for printing was prepared and offset printing was carried out, similar good results to those of Example 2 were obtained. Mechanical strength of the hydrophilic resin layer was very good.
  • EXAMPLE 8 7.5 liters of ethanol, 100 grams of t-butylaminoethyl methacrylate, 150 grams of N-isopropyl acrylamide and 2.25 kilo-grams of 2-hydroxyethyl methacrylate (containing 0.3% of ethyleneglycol dimethacrylate) together with 10 grams of t-butyl peroctoate were charged into a vessel and the solution heated at 85 C. for 7 hours to effect polymerization to a 90% conversion level. 0.25 gram of maleic anhydride and 1 gram of fine divided silica powder were added into the polymer solution thus obtained, and dispersed homogeneously. The solution was coated on an aluminium plate so that the dried thickness was 35 microns. Then the lithography for printing was prepared and offset printing was carried out, similar good results to those in Example 2 were obtained. Mechanical strength of the hydrophilic resin layer was very good.
  • a printing plate comprising a basic plate, a layer of water insoluble hydrophilic acrylate or methacrylate polymer selected from the group consisting of a polymer of a hydrophilic hydroxy lower alkyl acrylate, hydroxy lower alkyl methacrylate, hydroxy lower alkoxy lower alkyl acrylate and hydroxy lower alkoxy lower alkyl methacrylate over said plate and a photosensitive layer over said hydrophilic polymer layer.
  • the Water insoluble polymer comprises a polymer selected from the group consisting of a polymer of hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate and hydroxypropyl methacrylate.
  • the Water insoluble polymer comprises a polymer selected from the group consisting of a polymer of hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate and hydroxypropyl methacrylate.
  • a printing plate according to claim 8 wherein the polymer is a copolymer of said acrylate or methacrylate with a minor amount up to 15 of a cross-linking agent.
  • a printing plate according to claim 7 wherein the fine divided powdered inorganic material is powdered silica.

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  • Printing Plates And Materials Therefor (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
US00114887A 1970-02-19 1971-02-12 Printing plate Expired - Lifetime US3733200A (en)

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JP45013759A JPS492286B1 (enrdf_load_stackoverflow) 1970-02-19 1970-02-19

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US (1) US3733200A (enrdf_load_stackoverflow)
JP (1) JPS492286B1 (enrdf_load_stackoverflow)
BR (1) BR7101158D0 (enrdf_load_stackoverflow)
CA (1) CA989230A (enrdf_load_stackoverflow)
FR (1) FR2080616A1 (enrdf_load_stackoverflow)
GB (1) GB1354303A (enrdf_load_stackoverflow)
SE (1) SE370800B (enrdf_load_stackoverflow)

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861921A (en) * 1973-01-12 1975-01-21 Horst Hoffmann Subbing layers comprising polyamide and phenolic resin for metal bases of photopolymerizable elements
US4097647A (en) * 1975-11-24 1978-06-27 Allied Paper Incorporated Lithographic printing plate
US4097283A (en) * 1974-12-28 1978-06-27 Fuji Chemicals Industrial Company Limited Water-soluble composition admixture of copolymer having ethylenic unsaturation in side chain and anthraquinone photosensitizer
US4139386A (en) * 1976-12-08 1979-02-13 Swiss Aluminium Ltd. Method for obtaining engravers template
US4143021A (en) * 1976-07-23 1979-03-06 The Dow Chemical Company Composition suitable for use as desensitizing gumming solution for lithographic printing plates
US4168165A (en) * 1976-05-15 1979-09-18 Mita Industrial Company Limited Electrophotographic photosensitive material suitable for offset printing and lithography and process for production thereof
US4186250A (en) * 1975-04-07 1980-01-29 The Dow Chemical Company Method of desensitizing image-bearing lithographic plates
US4198470A (en) * 1975-06-09 1980-04-15 Western Litho Plate & Supply Co. Base plate and lithographic plate prepared by sensitization thereof
US4200688A (en) * 1975-04-07 1980-04-29 The Dow Chemical Company Method of treating image-bearing lithographic plates
US4232105A (en) * 1978-09-14 1980-11-04 Oji Paper Co., Ltd. Photosensitive lithographic printing plate with hydrophilic sublayer
US4266481A (en) * 1975-04-07 1981-05-12 The Dow Chemical Company Image-bearing lithographic plates with desensitizing coating
US4272605A (en) * 1975-06-09 1981-06-09 Western Litho Plate & Supply Co. Base plate and lithographic plate prepared by sensitization thereof
US4272604A (en) * 1975-06-09 1981-06-09 Western Litho Plate & Supply Co. Base plate and lithographic plate prepared by sensitization thereof
US4275138A (en) * 1973-07-23 1981-06-23 Fuji Photo Film Co., Ltd. Photosensitive diazonium compound containing composition and article with β-hydroxyalkyl acrylate or methacrylate
US4282301A (en) * 1977-12-21 1981-08-04 Okamoto Chemical Industry Corporation Photosensitive diazo coating compositions and plates
US4288520A (en) * 1978-08-03 1981-09-08 Hoechst Aktiengesellschaft Process of manufacturing light-sensitive copying material based on diazonium salt condensation products
US4374190A (en) * 1978-09-28 1983-02-15 Am International, Inc. Erasable intermediate diazo-type paper
US4407862A (en) * 1978-03-31 1983-10-04 W. R. Grace & Co. Method of making letterpress printing plates
US4416967A (en) * 1981-04-30 1983-11-22 Ricoh Co., Ltd. Diazo copying element
US4427765A (en) 1981-07-06 1984-01-24 Hoechst Aktiengesellschaft Hydrophilic coating of salt-type phosphorus or sulfur polymer on aluminum support materials for offset printing plates and process for manufacture and use with light sensitive layer thereon
US4427766A (en) 1981-07-06 1984-01-24 Hoechst Aktiengesellschaft Hydrophilic coating of salt type nitrogen polymer on aluminum support materials for offset printing plates and process for manufacture and use with light sensitive layer thereon
US4522910A (en) * 1975-06-19 1985-06-11 Napp Systems (Usa), Inc. Photosensitive graphic arts article
US4614701A (en) * 1984-09-28 1986-09-30 Sekisui Fine Chemical Co., Ltd. Photocurable diazo or azide composition with acrylic copolymer having hydroxy and amino groups on separate acrylic monomer units
EP0250377A1 (en) * 1986-05-15 1987-12-23 AB Wilh. Becker Composition for negative photoresists and use of the composition
US4970133A (en) * 1987-10-27 1990-11-13 Agfa-Gevaert, N.V. Presensitized imaging element suitable for use as a lithographic printing plate with single hydrophilic layer which includes a light-sensitive diazonium salt and tetraalkyl orthosilicate cross-linking agent
US4983500A (en) * 1987-10-30 1991-01-08 Hitachi, Ltd. Radiation imaging process for formation of contrast enhanced pattern using two photosensitive dialonium salt layers with removal of overlayer and developed resist pattern in underlayer
US4985344A (en) * 1986-07-04 1991-01-15 Hitachi, Ltd. Radiation imaging process for forming pattern without alkali-soluble polymer underlayer and water soluble radiation-sensitive diazonium salt overlayer
US5178961A (en) * 1990-07-21 1993-01-12 Hoechst Aktiengesellschaft Thermally crosslinkable hydrophilic copolymers and their use in reprography
US5178963A (en) * 1990-07-21 1993-01-12 Hoechst Aktiengesellschaft Hydrophilic copolymers and their use in reprography
US5219664A (en) * 1990-07-21 1993-06-15 Hoechst Aktiengesellschaft Hydrophilic copolymers and their use in reprography
US5262244A (en) * 1990-07-21 1993-11-16 Hoechst Aktiengesellschaft Hydrophilic copolymers and their use in reprography
US5302460A (en) * 1990-07-21 1994-04-12 Hoechst Aktiengesellschaft Support material for offset-printing plates in the form of a sheet, a foil or a web process for its production and offset-printing plate comprising said material
US5493971A (en) * 1994-04-13 1996-02-27 Presstek, Inc. Laser-imageable printing members and methods for wet lithographic printing
US5688629A (en) * 1993-10-22 1997-11-18 Agfa-Gevaert Ag Process for the production of lithographic printing plates utilizing peel development
US6497178B1 (en) * 1998-01-23 2002-12-24 Presstek, Inc. Lithographic printing members having secondary non-ablative layers for use with laser imaging apparatus

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DE2527083A1 (de) * 1974-07-03 1976-01-22 Xerox Corp Neue druckmatrizen, verfahren zu ihrer herstellung und ihre verwendung zum drucken
EP0653686B1 (en) * 1993-11-16 2000-01-05 Agfa-Gevaert N.V. Imaging element comprising a photopolymerizable composition and methods for producing lithographic plates therewith
DE69422478T2 (de) * 1993-11-16 2000-07-13 Agfa-Gevaert N.V., Mortsel Bildaufzeichnungselement, eine photopolymerisierbare Zusammensetzung enthaltend und Verfahren zur Herstellung von Flachdruckformen

Cited By (36)

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US3861921A (en) * 1973-01-12 1975-01-21 Horst Hoffmann Subbing layers comprising polyamide and phenolic resin for metal bases of photopolymerizable elements
US4275138A (en) * 1973-07-23 1981-06-23 Fuji Photo Film Co., Ltd. Photosensitive diazonium compound containing composition and article with β-hydroxyalkyl acrylate or methacrylate
US4097283A (en) * 1974-12-28 1978-06-27 Fuji Chemicals Industrial Company Limited Water-soluble composition admixture of copolymer having ethylenic unsaturation in side chain and anthraquinone photosensitizer
US4186250A (en) * 1975-04-07 1980-01-29 The Dow Chemical Company Method of desensitizing image-bearing lithographic plates
US4266481A (en) * 1975-04-07 1981-05-12 The Dow Chemical Company Image-bearing lithographic plates with desensitizing coating
US4200688A (en) * 1975-04-07 1980-04-29 The Dow Chemical Company Method of treating image-bearing lithographic plates
US4272604A (en) * 1975-06-09 1981-06-09 Western Litho Plate & Supply Co. Base plate and lithographic plate prepared by sensitization thereof
US4198470A (en) * 1975-06-09 1980-04-15 Western Litho Plate & Supply Co. Base plate and lithographic plate prepared by sensitization thereof
US4272605A (en) * 1975-06-09 1981-06-09 Western Litho Plate & Supply Co. Base plate and lithographic plate prepared by sensitization thereof
US4522910A (en) * 1975-06-19 1985-06-11 Napp Systems (Usa), Inc. Photosensitive graphic arts article
US4097647A (en) * 1975-11-24 1978-06-27 Allied Paper Incorporated Lithographic printing plate
US4168165A (en) * 1976-05-15 1979-09-18 Mita Industrial Company Limited Electrophotographic photosensitive material suitable for offset printing and lithography and process for production thereof
US4143021A (en) * 1976-07-23 1979-03-06 The Dow Chemical Company Composition suitable for use as desensitizing gumming solution for lithographic printing plates
US4139386A (en) * 1976-12-08 1979-02-13 Swiss Aluminium Ltd. Method for obtaining engravers template
US4282301A (en) * 1977-12-21 1981-08-04 Okamoto Chemical Industry Corporation Photosensitive diazo coating compositions and plates
US4407862A (en) * 1978-03-31 1983-10-04 W. R. Grace & Co. Method of making letterpress printing plates
US4288520A (en) * 1978-08-03 1981-09-08 Hoechst Aktiengesellschaft Process of manufacturing light-sensitive copying material based on diazonium salt condensation products
US4232105A (en) * 1978-09-14 1980-11-04 Oji Paper Co., Ltd. Photosensitive lithographic printing plate with hydrophilic sublayer
US4374190A (en) * 1978-09-28 1983-02-15 Am International, Inc. Erasable intermediate diazo-type paper
US4416967A (en) * 1981-04-30 1983-11-22 Ricoh Co., Ltd. Diazo copying element
US4427766A (en) 1981-07-06 1984-01-24 Hoechst Aktiengesellschaft Hydrophilic coating of salt type nitrogen polymer on aluminum support materials for offset printing plates and process for manufacture and use with light sensitive layer thereon
US4427765A (en) 1981-07-06 1984-01-24 Hoechst Aktiengesellschaft Hydrophilic coating of salt-type phosphorus or sulfur polymer on aluminum support materials for offset printing plates and process for manufacture and use with light sensitive layer thereon
US4614701A (en) * 1984-09-28 1986-09-30 Sekisui Fine Chemical Co., Ltd. Photocurable diazo or azide composition with acrylic copolymer having hydroxy and amino groups on separate acrylic monomer units
EP0250377A1 (en) * 1986-05-15 1987-12-23 AB Wilh. Becker Composition for negative photoresists and use of the composition
US4985344A (en) * 1986-07-04 1991-01-15 Hitachi, Ltd. Radiation imaging process for forming pattern without alkali-soluble polymer underlayer and water soluble radiation-sensitive diazonium salt overlayer
US4970133A (en) * 1987-10-27 1990-11-13 Agfa-Gevaert, N.V. Presensitized imaging element suitable for use as a lithographic printing plate with single hydrophilic layer which includes a light-sensitive diazonium salt and tetraalkyl orthosilicate cross-linking agent
US4983500A (en) * 1987-10-30 1991-01-08 Hitachi, Ltd. Radiation imaging process for formation of contrast enhanced pattern using two photosensitive dialonium salt layers with removal of overlayer and developed resist pattern in underlayer
US5178963A (en) * 1990-07-21 1993-01-12 Hoechst Aktiengesellschaft Hydrophilic copolymers and their use in reprography
US5178961A (en) * 1990-07-21 1993-01-12 Hoechst Aktiengesellschaft Thermally crosslinkable hydrophilic copolymers and their use in reprography
US5219664A (en) * 1990-07-21 1993-06-15 Hoechst Aktiengesellschaft Hydrophilic copolymers and their use in reprography
US5262244A (en) * 1990-07-21 1993-11-16 Hoechst Aktiengesellschaft Hydrophilic copolymers and their use in reprography
US5302460A (en) * 1990-07-21 1994-04-12 Hoechst Aktiengesellschaft Support material for offset-printing plates in the form of a sheet, a foil or a web process for its production and offset-printing plate comprising said material
US5688629A (en) * 1993-10-22 1997-11-18 Agfa-Gevaert Ag Process for the production of lithographic printing plates utilizing peel development
US5691106A (en) * 1993-10-22 1997-11-25 Agfa-Gevaert Ag Photosensitive material for the production of lithographic printing plates utilizing peel development
US5493971A (en) * 1994-04-13 1996-02-27 Presstek, Inc. Laser-imageable printing members and methods for wet lithographic printing
US6497178B1 (en) * 1998-01-23 2002-12-24 Presstek, Inc. Lithographic printing members having secondary non-ablative layers for use with laser imaging apparatus

Also Published As

Publication number Publication date
FR2080616A1 (enrdf_load_stackoverflow) 1971-11-19
DE2107901B2 (de) 1976-01-22
BR7101158D0 (pt) 1973-04-05
GB1354303A (en) 1974-06-05
SE370800B (enrdf_load_stackoverflow) 1974-10-28
CA989230A (en) 1976-05-18
JPS492286B1 (enrdf_load_stackoverflow) 1974-01-19
DE2107901A1 (de) 1971-09-02

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