US2584317A - Method of producing bimetallic printing forms - Google Patents

Method of producing bimetallic printing forms Download PDF

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Publication number
US2584317A
US2584317A US794257A US79425747A US2584317A US 2584317 A US2584317 A US 2584317A US 794257 A US794257 A US 794257A US 79425747 A US79425747 A US 79425747A US 2584317 A US2584317 A US 2584317A
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United States
Prior art keywords
layer
copper
metal
printing
etching
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Expired - Lifetime
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US794257A
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English (en)
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Aller Claes Bphirge
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/02—Local etching
    • 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
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/04—Printing plates or foils; Materials therefor metallic
    • B41N1/08—Printing plates or foils; Materials therefor metallic for lithographic printing
    • B41N1/10—Printing plates or foils; Materials therefor metallic for lithographic printing multiple

Definitions

  • planographicllprinte; ing' platesit. is known to :deposit on the "surface of; the metal which is.
  • therinvention consists a in a method: of producing planographic printing forms in which approtecting imagea-is used for protecting theparts of the printing surface oftheform which are IlOtetObe attacked by theetching agent duning'etchinge'and the-ieature characterizing theinventiQnEis-thatvthe protecting image is applied to I, the.-;surface: -of aj ga-lvanicallydeposited continuous-intermediate layer of a metal acting as one of themetalliccomponents in the plano--- graphic printing aiprocess which intermediate metal layer -iis again placed upon a base-layer' of- -a material acting as the other metallic component inethe bimetallic-planographic; printing process :andther none-protected parts of the metallic intermediate layer are-etched away right a through to the surface of the base, metalsby an:
  • etching agent which does not attacl; the protecting metal. 1 l-,1. ,7; (More particularly.according to the invention thee-methodis appliedto the-production of print ingaforms in which one oi-thecomponentsentering in the bimetallic printing process is chromium or a chromium-containing alloy or stainless steel.
  • a metal is used according to the present invention for the protection of the areas which are not to beattacked during etching, which has the effect that these parts will not at all be attacked. Consequently recording will be exact and the printing elements willnot alter their size or shape or adhere insufiiciently to the support.
  • the method which forms the subject matter of the presentinvention moreover differs from the known method in which-the one metallic component is deposited upon the other one through the openings of a copy placed thereon in that none of the two metallic components in the bimetallic planographic printing process are according to the present invention deposited through the openings of the copy. Thereby it is avoided that the deposited metallic component of v the said process will appear in undesired unevenness of thickness.
  • the present method diifers not only in that no resin layeris interposedbetween the base metal and the copy as mentioned above but also in that the metallic intermediate layer original copy.
  • the exactness is due to the thinness of the intermediate layer and the-capability of the protecting layer to completely protect the parts covered thereby.
  • Such exactness will not be obtained in the known method even if etching is carried to such a depth that it reaches a further base plate supporting the firstone and being of steel. This appears from the fact that the walls of the pits produced by etching are not vertical and that the purpose of the resinous layer used in the known method is to avoid the walls being vertical in order to secure the partsremaining after etching a broader base.
  • etchable and non-etchable-used above and in the following is notto be taken in the absolute sense of the word but means that the metalin question is one that is not attacked in the etching process in question.
  • chromium-containing alloysor stainless steel as the water-retaining component which'is the most important kind of planographic process with which the present invention can be used and particular great advantage can be obtained there may be used as is well known copper, brass or bronze as the ink-retaining component. These components will act in the printing process in the said capacities irrespectively whether one or the other is placed in the uppermost position and the present invention can be employed in connection with both possibilities. If chromium or a chromium-containing alloy is placed on a surface of an ink-retaining metal such as copper,
  • an etching agent by means of which this can be carried into efiect is hydrochloric acid provided that the protecting metal is one not attacked by this acid for instance lead.
  • an ink-retaining metal such as copper, brass or bronze is placed on the surface of the ink repelling metal, chromium, chromium-containing alloy or stainless steel the inkretaining metal must now be etchable and an etching agent capable of etching the exposed parts thereof away must be used. Examples of such etching agents are given in the following. Also in this case, however, the protecting metal must be non-etchable to the etching agent used.
  • iron, lead or tin or alloys thereof are used for the protecting metal.
  • These metals. are easy to apply in the electrolytical way and they ofier an excellent protection for the parts of the metallic interlayer which are not to be removed.
  • the protecting metal such as zinc or cadmium
  • a sulphidizing agent such as a solution of an alkali metal sulphide or alkali metal polysulphide, which converts the intermediate metal layer into an easily removable sulphide if this consists of copper, brass or bronze. If it consists of chromium etc. evidently this etching cannot be used.
  • this embodiment may be even preferable to the acid-etching method mentioned above since it is practically undamaging to such elements.
  • a sulphidizing etching agent it is preferable to support the etching process by using an electric current, which is passed through the etching agent using the printing form as one of the electrodes in the circuit. To remove the sulphide formed by the etching process it may.
  • the protecting metal is to be removed from the surface of the intermediate layer of metal before printing. This can be done'by means of an acid etching agent which does not' attack either of the two metals entering into the planographic printing process. In most cases diluted sulphuricacid will be found suitable.
  • the deposition of the protecting metal is preferably carried out by means of the electric current.
  • FIG. 1-4 show schematically the various layers of a printing form in section on four stages of its production.
  • Example 1 A plate S of stainless steel or of copper or nickel coated on one side with chromium or any other plate of which at least one surface is a surface of chromium or chromium-containing alloys, for instance, stainless steel is covered on the surface consisting of chromium, chromiumcontaining alloy or stainless steel with a continuous layer of copper C.
  • a light sensitive film for example, a chromate-gelatine layer which is then exposed to the influence of light through a transparent positive and developed in the ordinary manner.
  • the parts of the copying layer remaining after development on the surface of the continuous layer of copper is designated by L in Fig. 1.
  • the printing form appears now as a chromatecolloid image on a base of copper. This image is negative when considered as an image of colloid and positive if it is considered as an image of uncovered copper surfaces.
  • a protecting metal F is applied to the said areas.
  • the protecting consists in iron which is deposited in the electrolytical way.
  • an aqueous solution of an iron salt is applied to the surface of the plate placed on a table by means of a brush in the bottom of which at the roots of the bristles an iron electrode connected through the handle to the positive pole of a source of electricity is placed.
  • the printing form is connected to the negative pole.
  • the etching agent consists of chromic acid made by dissolving chromic, acid anhydride in water.
  • the plate is now composed as shown in Fig. 3.
  • etching agent consisting of a solution of diluted sulphuric acid or nitric acid after which the plate composed as shown in Fig. 4 is ready of use.
  • the layer of copper and the layer of protecting metal is shown in exaggerated thickness.
  • the layer of copper must be as thin as possible. Theoretically it needs only be of molecular thickness, but to increase its resistance to wear its thickness may practically be increased to, for example, a few hundredths of a millimeter.
  • the protecting metal may be used in similar thickness.
  • Example 2 The plate S is of copper or steel coated on at least one side with a layer of copper. This plate is now covered on the copper surface with a con- 6 tinuous layer of chromium C, for instance, by electrodeposition. As to the thickness of the layer or chromium the same considerations apply as in the case of copper in Example 1. copying layer is applied in the same manner as in Example 1 and exposed through a negative.
  • the printing form snows now a colloid image on a base of chromium.
  • the image is positive when considered as a colloid image and negative if considered as an image of uncovered chromium surface elements.
  • a protecting metal F consisting of lead is deposited on the surface areas not covered by the colloid image.
  • the lead is deposited by electrolysis in the manner described in Example l.
  • the colloid image is removed and the plate will be of the construction shown in Fig. 2.
  • the etching agent consists of hydrochloric acid which will not attack the lead and copper.
  • the plate is now constructed as shown in Fig. 3.
  • lvletllod of producing a planographic printing form with bhnetallicsuriace comprising the steps of: depositing gaivanically on to a base of stainless steel a thin continuous layer of copper, applying to this galvamcally deposited layer an image forming coating covering such parts of the layer subsequently to be removed, galvanically depositing on uncovered parts of the copper layer a thin layer or iron, removing the image Iorming coating, removing uncovered copper down to the base layer by means of cnromic acid and removing the iron layer by dilute sulphuric acid.
  • Method of produclng a planographic printing form with bimetallic surface comprising applying to the copper layer of a bimetallic printing form consisting of a stainless steel base carrymg a thin continuous layer of copper. an image forming coating covering such parts of the copper layer which are subsequently to be removed, depositing galvanically on the uncovered parts of the copper layer a thin layer of iron, removing the image forming coating, removing uncovered copper down to the base layer by means of chromic acid, and then removing the iron resist.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • ing And Chemical Polishing (AREA)
US794257A 1946-09-09 1947-12-29 Method of producing bimetallic printing forms Expired - Lifetime US2584317A (en)

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DK663842X 1946-09-09

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FR (1) FR958963A (en(2012))
GB (1) GB663842A (en(2012))
IT (1) IT440807A (en(2012))
NO (1) NO76687A (en(2012))

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2647864A (en) * 1952-05-29 1953-08-04 Daniel L Goffredo Etching process
US2760432A (en) * 1950-05-06 1956-08-28 Harris Seybold Co Lithographic plate and method of making it
US2950181A (en) * 1955-01-14 1960-08-23 Quod Bonum Nv Method of retouching etchings in intaglio printing forms and printing forms treated according to this method
US3037896A (en) * 1959-09-02 1962-06-05 Gen Dynamics Corp Masking process
US3210226A (en) * 1961-09-28 1965-10-05 North American Aviation Inc Method and means for controlling tapers in etching processes
US3249478A (en) * 1961-07-26 1966-05-03 Chemical Milling Internat Corp Process for producing a bimetallic structure by etching
US3287128A (en) * 1963-04-22 1966-11-22 Martin Mariatta Corp Lithographic plates and coatings
US3520746A (en) * 1965-12-21 1970-07-14 Printing Dev Inc Metal etch compositions
US3540954A (en) * 1966-12-30 1970-11-17 Texas Instruments Inc Method for manufacturing multi-layer film circuits
US3950569A (en) * 1972-05-05 1976-04-13 W. R. Grace & Co. Method for preparing coatings with solid curable compositions containing styrene-allyl alcohol copolymer based polythiols
US4297436A (en) * 1974-12-26 1981-10-27 Fuji Photo Film Co., Ltd. Method for producing a multilayer printing plate
US4567827A (en) * 1985-02-04 1986-02-04 Rockwell International Corporation Copper and nickel layered ink metering roller
US4603634A (en) * 1985-02-04 1986-08-05 Rockwell International Corporation Copper and nickel layered ink metering roller
US4846065A (en) * 1986-10-23 1989-07-11 Man Technologie Gmbh Printing image carrier with ceramic surface
US4857436A (en) * 1987-12-28 1989-08-15 Nouel Jean Marie Offset plates with two chromium layers
US4996131A (en) * 1987-12-28 1991-02-26 Nouel Jean Marie Offset plate with thin chromium layer and method of making
EP1212202A4 (en) * 1999-09-09 2004-12-15 Universal Engraving Inc LAMINATE, NON-FERROUS / FERROMAGNETIC LAMINATED GRAPHIC ARTS PRINTING CORES AND METHOD FOR PRODUCING THE SAME
CN105667065A (zh) * 2014-11-17 2016-06-15 中国科学院化学研究所 一种凹版印刷用基板的喷墨打印制版方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US444951A (en) * 1891-01-20 Process of preparing plates or surfaces for ornamentation
US758599A (en) * 1897-02-23 1904-04-26 Aluminum Compound Plate Company Printing-plate.
US797668A (en) * 1904-08-03 1905-08-22 Joanny Agarithe Dejey Process of engraving and etching metal.
US1376365A (en) * 1917-12-24 1921-04-26 Gotthold E Wertheimer Process of preparing stencil-plates, die-plates, and the like
US1783664A (en) * 1929-03-26 1930-12-02 Peter F Mcgovern Shafting for engines
US1871734A (en) * 1927-09-05 1932-08-16 Daniel Maurits Kan Motor car frame
US1886817A (en) * 1927-11-19 1932-11-08 American Sales Book Co Ltd Dry plate process printing
US2214950A (en) * 1936-07-11 1940-09-17 Aller Claes Borge Planographic printing plate
US2241585A (en) * 1938-12-07 1941-05-13 Mack Mfg Corp Process for removing metallic coatings from metallic parts
US2408220A (en) * 1943-02-05 1946-09-24 Westinghouse Electric Corp Stripping of copper from zinc

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US444951A (en) * 1891-01-20 Process of preparing plates or surfaces for ornamentation
US758599A (en) * 1897-02-23 1904-04-26 Aluminum Compound Plate Company Printing-plate.
US797668A (en) * 1904-08-03 1905-08-22 Joanny Agarithe Dejey Process of engraving and etching metal.
US1376365A (en) * 1917-12-24 1921-04-26 Gotthold E Wertheimer Process of preparing stencil-plates, die-plates, and the like
US1871734A (en) * 1927-09-05 1932-08-16 Daniel Maurits Kan Motor car frame
US1886817A (en) * 1927-11-19 1932-11-08 American Sales Book Co Ltd Dry plate process printing
US1783664A (en) * 1929-03-26 1930-12-02 Peter F Mcgovern Shafting for engines
US2214950A (en) * 1936-07-11 1940-09-17 Aller Claes Borge Planographic printing plate
US2241585A (en) * 1938-12-07 1941-05-13 Mack Mfg Corp Process for removing metallic coatings from metallic parts
US2408220A (en) * 1943-02-05 1946-09-24 Westinghouse Electric Corp Stripping of copper from zinc

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2760432A (en) * 1950-05-06 1956-08-28 Harris Seybold Co Lithographic plate and method of making it
US2647864A (en) * 1952-05-29 1953-08-04 Daniel L Goffredo Etching process
US2950181A (en) * 1955-01-14 1960-08-23 Quod Bonum Nv Method of retouching etchings in intaglio printing forms and printing forms treated according to this method
US3037896A (en) * 1959-09-02 1962-06-05 Gen Dynamics Corp Masking process
US3249478A (en) * 1961-07-26 1966-05-03 Chemical Milling Internat Corp Process for producing a bimetallic structure by etching
US3210226A (en) * 1961-09-28 1965-10-05 North American Aviation Inc Method and means for controlling tapers in etching processes
US3287128A (en) * 1963-04-22 1966-11-22 Martin Mariatta Corp Lithographic plates and coatings
US3520746A (en) * 1965-12-21 1970-07-14 Printing Dev Inc Metal etch compositions
US3540954A (en) * 1966-12-30 1970-11-17 Texas Instruments Inc Method for manufacturing multi-layer film circuits
US3950569A (en) * 1972-05-05 1976-04-13 W. R. Grace & Co. Method for preparing coatings with solid curable compositions containing styrene-allyl alcohol copolymer based polythiols
US4297436A (en) * 1974-12-26 1981-10-27 Fuji Photo Film Co., Ltd. Method for producing a multilayer printing plate
US4567827A (en) * 1985-02-04 1986-02-04 Rockwell International Corporation Copper and nickel layered ink metering roller
US4603634A (en) * 1985-02-04 1986-08-05 Rockwell International Corporation Copper and nickel layered ink metering roller
US4846065A (en) * 1986-10-23 1989-07-11 Man Technologie Gmbh Printing image carrier with ceramic surface
US4857436A (en) * 1987-12-28 1989-08-15 Nouel Jean Marie Offset plates with two chromium layers
US4996131A (en) * 1987-12-28 1991-02-26 Nouel Jean Marie Offset plate with thin chromium layer and method of making
EP1212202A4 (en) * 1999-09-09 2004-12-15 Universal Engraving Inc LAMINATE, NON-FERROUS / FERROMAGNETIC LAMINATED GRAPHIC ARTS PRINTING CORES AND METHOD FOR PRODUCING THE SAME
CN105667065A (zh) * 2014-11-17 2016-06-15 中国科学院化学研究所 一种凹版印刷用基板的喷墨打印制版方法
CN105667065B (zh) * 2014-11-17 2017-12-05 中国科学院化学研究所 一种凹版印刷用基板的喷墨打印制版方法

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FR958963A (en(2012)) 1950-03-22
IT440807A (en(2012))
NO76687A (en(2012))
GB663842A (en) 1951-12-27

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