GB705053A - Improvements in photomechanical printing surfaces and methods of producing the same - Google Patents

Improvements in photomechanical printing surfaces and methods of producing the same

Info

Publication number
GB705053A
GB705053A GB364749A GB364749A GB705053A GB 705053 A GB705053 A GB 705053A GB 364749 A GB364749 A GB 364749A GB 364749 A GB364749 A GB 364749A GB 705053 A GB705053 A GB 705053A
Authority
GB
United Kingdom
Prior art keywords
chromium
etched
etching liquid
positive
tone
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
Application number
GB364749A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DAVID JAMES BLACK
Coates Brothers and Co Ltd
Original Assignee
DAVID JAMES BLACK
Coates Brothers and Co Ltd
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.)
Filing date
Publication date
Application filed by DAVID JAMES BLACK, Coates Brothers and Co Ltd filed Critical DAVID JAMES BLACK
Priority to GB364749A priority Critical patent/GB705053A/en
Publication of GB705053A publication Critical patent/GB705053A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41CPROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00Forme preparation
    • B41C1/02Engraving; Heads therefor
    • B41C1/025Engraving; Heads therefor characterised by means for the liquid etching of substrates for the manufacturing of relief or intaglio printing forms, already provided with resist pattern
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23FNON-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
    • C23F1/00Etching metallic material by chemical means
    • C23F1/10Etching compositions
    • C23F1/14Aqueous compositions
    • C23F1/16Acidic compositions
    • C23F1/18Acidic compositions for etching copper or alloys thereof

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)

Abstract

705,053. Photomechanical printing surfaces. COATES BROS. & CO., Ltd., and BLACK, D. J. Feb. 1, 1950 [Feb. 10, 1949], No. 3647/49. Class 98(2) [Also in Group XVI] A chromium-surfaced copper, brass or zinc plate or cylinder is etched through a developed line or half-tone resist with a first etching liquid which will attack the chromium but not the underlying metal, and then the latter is etched through the resulting chromium stencil with a second etching liquid which will not attack the chromium. The result is, normally, an intaglio printing surface but if the underlying metal is only moderately deeply etched printing may be effected by lithographic means, using the ink refusing and water accepting property of chromium. A chromium plated copper sheet may be sensitized as with bichromated albumen, gum arabic, fish glue or polyvinyl alcohol, exposed under a positive, developed with water, stoved if desired, treated with hydrochloric acid, which may be modified as with glycerin, to etch the chromium, and then etching is continued with or without removal of the resist with ferric nitrate solution which acts on the exposed copper only. Dilute nitric acid or calcium or zinc nitrate may replace ferric nitrate as second etching liquid. Stagnation of the liquid during the second etch produces shallower depressions in smaller dot areas. Doctor lands for larger ink-receiving areas may result from the presence of small transparent dots in dark areas of a half-tone positive, or may be provided by exposure through a half-tone positive and a negative of the original screen in register, or by use of a cross stop in the camera when the screen image is being made. Specification 475,902, [Group XVI], is referred to.
GB364749A 1949-02-10 1949-02-10 Improvements in photomechanical printing surfaces and methods of producing the same Expired GB705053A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB364749A GB705053A (en) 1949-02-10 1949-02-10 Improvements in photomechanical printing surfaces and methods of producing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB364749A GB705053A (en) 1949-02-10 1949-02-10 Improvements in photomechanical printing surfaces and methods of producing the same

Publications (1)

Publication Number Publication Date
GB705053A true GB705053A (en) 1954-03-10

Family

ID=9762272

Family Applications (1)

Application Number Title Priority Date Filing Date
GB364749A Expired GB705053A (en) 1949-02-10 1949-02-10 Improvements in photomechanical printing surfaces and methods of producing the same

Country Status (1)

Country Link
GB (1) GB705053A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143778A (en) * 1983-06-06 1985-02-20 Psi Star Inc Etching copper and other metals
CN104723654A (en) * 2015-02-03 2015-06-24 西安印钞有限公司 Method for preparing copper gravure plate by utilizing Arabian photosensitive adhesive

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143778A (en) * 1983-06-06 1985-02-20 Psi Star Inc Etching copper and other metals
CN104723654A (en) * 2015-02-03 2015-06-24 西安印钞有限公司 Method for preparing copper gravure plate by utilizing Arabian photosensitive adhesive

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