GB715961A - Photographic copying process - Google Patents

Photographic copying process

Info

Publication number
GB715961A
GB715961A GB2406951A GB2406951A GB715961A GB 715961 A GB715961 A GB 715961A GB 2406951 A GB2406951 A GB 2406951A GB 2406951 A GB2406951 A GB 2406951A GB 715961 A GB715961 A GB 715961A
Authority
GB
United Kingdom
Prior art keywords
developing
developer
complementary
image
silver
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
GB2406951A
Inventor
Anthony Ernest Jackson
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.)
Kodak Ltd
Original Assignee
Kodak 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 Kodak Ltd filed Critical Kodak Ltd
Priority to GB2406951A priority Critical patent/GB715961A/en
Priority to FR1062830D priority patent/FR1062830A/en
Priority to CH309586D priority patent/CH309586A/en
Priority to DEG9968A priority patent/DE949707C/en
Publication of GB715961A publication Critical patent/GB715961A/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
    • G03F7/004—Photosensitive materials
    • G03F7/06—Silver salts
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/29—Development processes or agents therefor
    • G03C5/315—Tanning development

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

715,961. Photographic copying processes; photomechanical printing plates. KODAK, Ltd. Aug. 18, 1952 [Oct. 16, 1951], No. 24069/51. Class 98(2) A latent line or half-tone image is formed in a gelatino-silver halide emulsion layer on a support preferably of paper by contact, reflex, projection or camera exposure and processed to form both hardened and complementary unhardened images by methods (a) developing in a tanning developer, forming a complementary latent image in the emulsion and developing in a non-tanning developer, (b) developing in a non-tanning developer, forming a complementary latent image and developing in a tanning developer, or (c) developing in a tanning developer and treating to reduce residual silver halide in the complementary areas to silver without hardening such areas and thereafter transferring the unhardened gelatin together with the silver contained therein by contact on to a second support at elevated temperature as of 75-110‹F. The transferred image is thus negative in method (b) and positive in methods (a) and (c) to the original subject matter and may be revealed by pulling the two supports apart. Sodium sulphide may be used in method (c) to blacken the residual silver halide. In application of the invention to printing plates, including rollers, the second support is constituted by a printing plate and the transferred image is hardened as with alum or formaldehyde to form a lithographic ink accepter or an etching resist. A single example describes reflex printing of a line document, treatment in a pyro developer, washing, treatment in bright light in a metolquinol developer, washing again, pressing into contact.with plain paper, heating, and peeling off the paper to reveal the positive silver image thereon. Specification 655.274 is referred to.
GB2406951A 1951-10-16 1951-10-16 Photographic copying process Expired GB715961A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB2406951A GB715961A (en) 1951-10-16 1951-10-16 Photographic copying process
FR1062830D FR1062830A (en) 1951-10-16 1952-09-09 Photographic reproduction process
CH309586D CH309586A (en) 1951-10-16 1952-09-24 Photographic copying process.
DEG9968A DE949707C (en) 1951-10-16 1952-10-12 Photographic copying and contact process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2406951A GB715961A (en) 1951-10-16 1951-10-16 Photographic copying process

Publications (1)

Publication Number Publication Date
GB715961A true GB715961A (en) 1954-09-22

Family

ID=10205870

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2406951A Expired GB715961A (en) 1951-10-16 1951-10-16 Photographic copying process

Country Status (4)

Country Link
CH (1) CH309586A (en)
DE (1) DE949707C (en)
FR (1) FR1062830A (en)
GB (1) GB715961A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159484A (en) * 1959-12-02 1964-12-01 Gevaert Photo Prod Nv Method for preparing spirit duplicating masters

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159484A (en) * 1959-12-02 1964-12-01 Gevaert Photo Prod Nv Method for preparing spirit duplicating masters

Also Published As

Publication number Publication date
DE949707C (en) 1956-09-27
CH309586A (en) 1955-09-15
FR1062830A (en) 1954-04-27

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