GB204101A - Improved process for photographically copying line drawings, letterpress and the like - Google Patents

Improved process for photographically copying line drawings, letterpress and the like

Info

Publication number
GB204101A
GB204101A GB1678822A GB1678822A GB204101A GB 204101 A GB204101 A GB 204101A GB 1678822 A GB1678822 A GB 1678822A GB 1678822 A GB1678822 A GB 1678822A GB 204101 A GB204101 A GB 204101A
Authority
GB
United Kingdom
Prior art keywords
letterpress
bath
line drawings
emulsion
colouring
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
GB1678822A
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.)
Mimosa AG
Original Assignee
Mimosa AG
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 Mimosa AG filed Critical Mimosa AG
Priority to GB1678822A priority Critical patent/GB204101A/en
Publication of GB204101A publication Critical patent/GB204101A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G03C5/50—Reversal development; Contact processes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Paper (AREA)

Abstract

204,101. Mimosa Alit.-Ges., and Loening, E. June 17, 1922. Papers; emulsion coatings, preparing; toning and alter-treatment.-Line drawings, letterpress, &c. are copied by exposing in a camera a thinlycoated silver bromide paper, developing, dissolving out the exposed portions of the emulsion by treatment with a bath of acid persulphate or hydrogen peroxide, and colouring the portions remaining, for example with a sulphide, bath or by reduction. The colouring step may be omitted if a coloured emulsion is used, or colouring material may be added to the developer or to the persulphate or peroxide bath. Reference has been directed by the Comptroller to Specifications 7188/95, 22735/05 and 182,846.
GB1678822A 1922-06-17 1922-06-17 Improved process for photographically copying line drawings, letterpress and the like Expired GB204101A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1678822A GB204101A (en) 1922-06-17 1922-06-17 Improved process for photographically copying line drawings, letterpress and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1678822A GB204101A (en) 1922-06-17 1922-06-17 Improved process for photographically copying line drawings, letterpress and the like

Publications (1)

Publication Number Publication Date
GB204101A true GB204101A (en) 1923-09-17

Family

ID=10083663

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1678822A Expired GB204101A (en) 1922-06-17 1922-06-17 Improved process for photographically copying line drawings, letterpress and the like

Country Status (1)

Country Link
GB (1) GB204101A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675313A (en) * 1947-11-04 1954-04-13 Eastman Kodak Co Photographic reproduction process
US2739890A (en) * 1952-01-21 1956-03-27 Eastman Kodak Co Photographic reproduction process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675313A (en) * 1947-11-04 1954-04-13 Eastman Kodak Co Photographic reproduction process
US2739890A (en) * 1952-01-21 1956-03-27 Eastman Kodak Co Photographic reproduction process

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