US2429107A - Method of producing a stainless - Google Patents

Method of producing a stainless Download PDF

Info

Publication number
US2429107A
US2429107A US2429107DA US2429107A US 2429107 A US2429107 A US 2429107A US 2429107D A US2429107D A US 2429107DA US 2429107 A US2429107 A US 2429107A
Authority
US
United States
Prior art keywords
plate
printing
copper
metal
solution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Other languages
English (en)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication date
Application granted granted Critical
Publication of US2429107A publication Critical patent/US2429107A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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

  • the present invention relates to the manufacture of a printing plate for offset printing, 1. e., a printing plate of the type where the ink transferring and the ink repellent portions lie in the same plane or have a level difference insufficient for relief-process printing or intaglio printing.
  • a printing plate for offset printing 1. e., a printing plate of the type where the ink transferring and the ink repellent portions lie in the same plane or have a level difference insufficient for relief-process printing or intaglio printing.
  • plates consisting of or coated with rust-resisting steel, a rust-resisting steel alloy, chromium, chromium alloy-s or similar rustresisting material with good colour repelling properties.
  • loys or similar corrosionproof materials develop"- ing the image and treating the portions of the plate laid bare by the development with a solution which contains a metal compound the metal of which has a lower electrolytical dissolution pressure than has the metal of the base surface of the plate, the metal of the compound of the said solution having greater adhesion relatively to water-insoluble offset printing inks than has the material whereof the base surface of the plate consists.
  • the treating solution may comprise a metal compound, the metal of which will form an alloy with the base metal, said alloy having a greater adhesion relatively to water-insoluble offsetprinting inks than has the material whereof the base surface of the plate consists.
  • the etching solution should preferably contain cuprous chloride.
  • a plate consisting of rust-resisting steel is subjected in known manner to a roughening or graining process by mechanical means in order to secure a larger surface on the plate for the image and to increase the lasting qualities of the latter.
  • the plate is subsequently cleansed in order to prevent the adhesion of grease at places which shall be water-receptive.
  • a solution containing about 2% of formic acid, about 5% of alum and nitric acid may be used.
  • the plate is coated with a photographic layer containing for example the following chemicals: 75 grams of ammonium bichromate and 10 grams of manganese sulfate dissolved in 325 cm. of water, 50 grams of albumin dissolved in 150 cm. of water, 1 litre solution of gum arabic of 14.5 B. and cm. of ammonia of the specific grav- After the layer has been applied the plate is exposed. Then the image is developed by means of an aqueous solution. When employing ing away the largest portion of the layer formed thereof.
  • the method according to the present invention which is mainly characterized by applying a photographic layer to a plate consisting of or coated with a metal or metal alloy with ink repellent properties, preferably a corrosio-nproof metal or metal alloy, such as rust-resisting steel, a rustr'esistlngsteel alloy, chromium or chromium althe photographic layer above described one may use a calcium chloride solution of 36 B., 1 litre of which contains 50 grams of lactic acid and 40 cm. of 96% alcohol.
  • a metal or metal alloy with ink repellent properties preferably a corrosio-nproof metal or metal alloy, such as rust-resisting steel, a rustr'esistlngsteel alloy, chromium or chromium althe photographic layer above described
  • etching solution which may be composed as follows: 1 litre calcium chloride solution having a specific gravity of 1.2-1.4 (about 39 36.), about 25 grams of ferric chloride, about 10 cm. of nitric acid, about 30 cm! of hydrochloric acid as well as about 2'5 grams of cuprous chloride.
  • the addition of cuprous chloride may of course vary, for instance within the range to 100 grams; the said quantity of about 25 grams has, however, proved to be especially suitable and sufiicient for the purpose.
  • the plate after corrections, if any, is ready to be prepared for printing in the same way as with usual zinc plates, i. e., by greasing the image surface and washing away the hardened photographic layer which covers those portions of the plate which shall be water receptive and ink repellent.
  • the said etching solution Through the treatment with the said etching solution there has formed on the image surface an extremely thin copper layer which has good adhesive properties relatively to the grease and printing-ink. In the following the formation of the copper coat and the conditions with respect thereto will be touched upon.
  • Corrosion-proof metals e. g., rust-resisting steel
  • Corrosion-proof metals are sometimes passive, i. e., they have such an electrolytical dissolution pressure that copper cannot deposit on same.
  • any adsorptive copper layer because the places where adsorption could take place are occupied by passivating atoms. It is assumed that these atoms are oxygen atoms.
  • the develop-ing solution has an activating influence on the corrosionproof plate, e. g., the steel plate, because it consists of a calcium chloride solution which contains lactic acid.
  • the chemicals present in the treating bath in addition to the copper salt are so selected that the plate is kept active through the bath. It is believed that this efiect should be mainly attributed to the high chloride concentration of the bath.
  • the iron content of the bath is beneficial in that it' suppresses the deposition of copper, at the beginning thereby exercising a controlling influence.
  • the potential between the plate and the treating bath depends upon the ratio between iron ions and copper ions. If there were no iron ions present the potential at the beginning would be so high as to cause irregular distribution of the copper when the bath is poured.
  • the specific gravity of the solution previously stated (1.2-1.4) is convenient to prevent the precipitation of the iron as hydroxide by hydrolysis.
  • Nitric acid normally acts passivating but in the present case there is no risk of its having any detrimental effect because the concentration is too small to produce passivity.
  • the concentration may for instance be kept at about 0.6% by weight.
  • the importance of the nitric acid in the treating bath resides mainly therein that it causes a protraction of the time of treatment which may be of advantage.
  • a printing plate produced by the method according to the invention differs considerably from known printing plates having a copper coat produced galvanically or by spraying.
  • a plate of the latter type has a copper base formed by many millions of atom layers which is consequently distinctly perceivable and measurable.
  • a method of manufacturing a printing plate for offset printing the ink repellent and ink transferring surface portions of which lie in the same plane or have a 1eve1 difference insufiicient for such printing processes as relief process printing and intaglio printing
  • the plate comprising a stainless steel surface with greasy ink repellent and water receptive properties, characterized by applying a photographic light-sensitive layer to said plate, exposing said plate, developing the resulting image and treating the portions of the plate laid bare by the development With an etching solution which contains copper chloride capable of producing a deposit of copper on said bare portions by metal displacement, said copper forming an alloy with the stainless steel having a greater adhesion relatively to water-insoluble offset printing inks than the stainless steel of the plate, and washing away the hardened remainder of the light-sensitive layer; said etching solution containing calcium chloride, ferric chloride, nitric acid, hydrochloric acid and cuprous chloride.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • ing And Chemical Polishing (AREA)
US2429107D 1943-04-02 Method of producing a stainless Expired - Lifetime US2429107A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB534043A GB564753A (enrdf_load_stackoverflow) 1943-04-02 1943-04-02

Publications (1)

Publication Number Publication Date
US2429107A true US2429107A (en) 1947-10-14

Family

ID=9794272

Family Applications (1)

Application Number Title Priority Date Filing Date
US2429107D Expired - Lifetime US2429107A (en) 1943-04-02 Method of producing a stainless

Country Status (2)

Country Link
US (1) US2429107A (enrdf_load_stackoverflow)
GB (1) GB564753A (enrdf_load_stackoverflow)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2676886A (en) * 1950-08-31 1954-04-27 Us Printing And Lithograph Com Method of producing printing plates
US2703295A (en) * 1952-10-07 1955-03-01 Morris S Kantrowitz Nonelectrolytic method for making bimetallic offset printing copper plating composition and method of plating
US2734806A (en) * 1954-08-24 1956-02-14 Germanium etchings
US2841079A (en) * 1953-05-20 1958-07-01 Elbert A Dulfer Lithography
US2865750A (en) * 1955-03-18 1958-12-23 Eastman Kodak Co Photomechanical reproduction
US2907656A (en) * 1953-11-12 1959-10-06 Chrome Steel Plate Corp Lithographic plates
US2937594A (en) * 1955-05-03 1960-05-24 Harris Intertype Corp Lithographic printing
US2940837A (en) * 1956-12-31 1960-06-14 United Aircraft Corp Etching bath for corrosion and heat resistant alloys and process of etching
US2940838A (en) * 1957-08-19 1960-06-14 Boeing Co Chemical milling
US3244094A (en) * 1962-07-16 1966-04-05 Kimberly Clark Co Metal embossing roller for paper
US3357905A (en) * 1960-03-28 1967-12-12 Cleveland Twist Drill Co Electrolyte composition and method of electrolytically removing stock from workpiece
US4287288A (en) * 1978-02-15 1981-09-01 Rhone-Poulenc-Graphic Lithographic plate of tin-plated steel and method of manufacture
WO1996022883A1 (en) * 1995-01-24 1996-08-01 Corning Incorporated Precision imaging components and methods for their formation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007057798B4 (de) 2006-12-20 2018-12-06 Heidelberger Druckmaschinen Ag Verfahren zum Behandeln einer drucktechnischen Oberfläche

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2676886A (en) * 1950-08-31 1954-04-27 Us Printing And Lithograph Com Method of producing printing plates
US2703295A (en) * 1952-10-07 1955-03-01 Morris S Kantrowitz Nonelectrolytic method for making bimetallic offset printing copper plating composition and method of plating
US2841079A (en) * 1953-05-20 1958-07-01 Elbert A Dulfer Lithography
US2907656A (en) * 1953-11-12 1959-10-06 Chrome Steel Plate Corp Lithographic plates
US2734806A (en) * 1954-08-24 1956-02-14 Germanium etchings
US2865750A (en) * 1955-03-18 1958-12-23 Eastman Kodak Co Photomechanical reproduction
US2937594A (en) * 1955-05-03 1960-05-24 Harris Intertype Corp Lithographic printing
US2940837A (en) * 1956-12-31 1960-06-14 United Aircraft Corp Etching bath for corrosion and heat resistant alloys and process of etching
US2940838A (en) * 1957-08-19 1960-06-14 Boeing Co Chemical milling
US3357905A (en) * 1960-03-28 1967-12-12 Cleveland Twist Drill Co Electrolyte composition and method of electrolytically removing stock from workpiece
US3244094A (en) * 1962-07-16 1966-04-05 Kimberly Clark Co Metal embossing roller for paper
US4287288A (en) * 1978-02-15 1981-09-01 Rhone-Poulenc-Graphic Lithographic plate of tin-plated steel and method of manufacture
WO1996022883A1 (en) * 1995-01-24 1996-08-01 Corning Incorporated Precision imaging components and methods for their formation

Also Published As

Publication number Publication date
GB564753A (enrdf_load_stackoverflow) 1944-10-11

Similar Documents

Publication Publication Date Title
US2429107A (en) Method of producing a stainless
GB2111698A (en) Method for producing a metal lithographic plate
DE2537160C3 (de) Verwendung einer überzogenen Stahlplatte als Trägermaterial für Flachdruckformen
US2882153A (en) Planographic printing plate
US2676886A (en) Method of producing printing plates
US2214950A (en) Planographic printing plate
US4596189A (en) Lithographic printing plate
US3390061A (en) Protective localized area resin coatings for electroplating
US3395052A (en) Pretreating process for phosphatetreating steel sheets and plated steel sheets
US2558504A (en) Method of producing a printing form having a bimetallic surface
US2924534A (en) Method for the production of a metallic printing member
US3577920A (en) Metallic lithographic plate and method of making the same
US1994499A (en) Engraver's etching acid of increased efficiency
JPS6349397B2 (enrdf_load_stackoverflow)
US4585529A (en) Method for producing a metal lithographic plate
DE2844425C3 (de) Verfahren zur Aktivierung von Kunststoffoberflächen
US3268358A (en) Diffusion cladding
JPS6230262B2 (enrdf_load_stackoverflow)
US2585864A (en) Printing plate etching
US2937594A (en) Lithographic printing
DE3312496A1 (de) Verfahren zur elektrochemischen aufrauhung und anodischen oxidation von aluminium und dessen verwendung als traegermaterial fuer offsetdruckplatten
JP3022717B2 (ja) 印刷機用湿し水ローラ
DE2244486C2 (de) Flachdruckplatte, die zu einer wasserfrei arbeitenden Flachdruckform verarbeitbar ist, und Verfahren zu ihrer Herstellung
GB500829A (en) Improvements in or relating to the electrolytic production of printing forms
US1949233A (en) Process for the production of mercurized printing plates