GB262531A - Improvements in or relating to photo mechanical processes of printing - Google Patents

Improvements in or relating to photo mechanical processes of printing

Info

Publication number
GB262531A
GB262531A GB23023/25A GB2302325A GB262531A GB 262531 A GB262531 A GB 262531A GB 23023/25 A GB23023/25 A GB 23023/25A GB 2302325 A GB2302325 A GB 2302325A GB 262531 A GB262531 A GB 262531A
Authority
GB
United Kingdom
Prior art keywords
printing
image
treated
bichromate
bath
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
GB23023/25A
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.)
EUSTACE BERNARD ELDRIDGE
JOHN ARVILLE HAESELER
Original Assignee
EUSTACE BERNARD ELDRIDGE
JOHN ARVILLE HAESELER
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 EUSTACE BERNARD ELDRIDGE, JOHN ARVILLE HAESELER filed Critical EUSTACE BERNARD ELDRIDGE
Priority to GB23023/25A priority Critical patent/GB262531A/en
Priority to US133513A priority patent/US1793070A/en
Priority to FR622755D priority patent/FR622755A/en
Priority to DEE34569D priority patent/DE453705C/en
Publication of GB262531A publication Critical patent/GB262531A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/14—Production of collotype printing forms

Abstract

262,531. Eldridge, E. B., and Haeseler, J. A. Sept. 15, 1925. Photo-mechanical printing-surfaces; developing.-To obtain grainless collotype printing-surfaces from silver images, an ordinary plate or emulsion is developed with a developer whose action is so feeble or restricted as to produce an extremely faint or tenuous image, before being fixed and treated with the bichromate or like hardening bath. A developer (e.g. amidol) diluted from 12 to 20 times the strength ordinarily employed may be employed and a hardening bath composed of copper sulphate, potassium bromide, potassium bichromate, and chromic acid. The bleached silver image may be dissolved out or left in. Copper chloride and sodium chloride may be substituted for the copper sulphate. The treated image may, if necessary, be further hardened by a weak chrome alum or other bath. The process may be applied to kinematograph films, for printing copies thereof, or to enlarged positives which can be exposed through a. reversed negative.
GB23023/25A 1925-09-15 1925-09-15 Improvements in or relating to photo mechanical processes of printing Expired GB262531A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB23023/25A GB262531A (en) 1925-09-15 1925-09-15 Improvements in or relating to photo mechanical processes of printing
US133513A US1793070A (en) 1925-09-15 1926-09-03 Photomechanical process of printing
FR622755D FR622755A (en) 1925-09-15 1926-09-03 Improvements in photo-mechanical printing processes
DEE34569D DE453705C (en) 1925-09-15 1926-09-07 Process for the production of a grainless printing surface which can be used for collotype printing or light glue printing from an invisible structure contained in a silver colloid layer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23023/25A GB262531A (en) 1925-09-15 1925-09-15 Improvements in or relating to photo mechanical processes of printing

Publications (1)

Publication Number Publication Date
GB262531A true GB262531A (en) 1926-12-15

Family

ID=10188843

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23023/25A Expired GB262531A (en) 1925-09-15 1925-09-15 Improvements in or relating to photo mechanical processes of printing

Country Status (4)

Country Link
US (1) US1793070A (en)
DE (1) DE453705C (en)
FR (1) FR622755A (en)
GB (1) GB262531A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE485609A (en) * 1947-11-04 1942-11-12
US2596754A (en) * 1947-11-04 1952-05-13 Eastman Kodak Co Photomechanical copy method
US2692198A (en) * 1950-08-11 1954-10-19 Maurice D Whitney Methods of producing half-tone printing plates
US3856529A (en) * 1967-05-26 1974-12-24 Kalle Ag Method and materials for making half tone prints

Also Published As

Publication number Publication date
US1793070A (en) 1931-02-17
DE453705C (en) 1927-12-16
FR622755A (en) 1927-06-07

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