GB527332A - Improvements in the production of reversed photographic images - Google Patents

Improvements in the production of reversed photographic images

Info

Publication number
GB527332A
GB527332A GB10778/39A GB1077839A GB527332A GB 527332 A GB527332 A GB 527332A GB 10778/39 A GB10778/39 A GB 10778/39A GB 1077839 A GB1077839 A GB 1077839A GB 527332 A GB527332 A GB 527332A
Authority
GB
United Kingdom
Prior art keywords
image
developing
phenylenediamine
produced
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
GB10778/39A
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
Publication of GB527332A publication Critical patent/GB527332A/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
    • 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
    • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
    • 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
    • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
    • G03C7/32—Colour coupling substances
    • G03C7/34—Couplers containing phenols
    • G03C7/346—Phenolic couplers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

527,332. Photographic reversal processes. KODAK, Ltd. April 6, 1939, No. 10778. Convention date, April 6; 1938. [Class 98 (ii)] A black-and-white reversed image is produced by developing a reversed silver salt image with a coupling developer containing a developing agent and the colour former pbenzylphenol, which couples with the oxidation products of the developing agent, formed where a silver image is produced by development, to give a neutral grey image. The negative silver image is removed by Farmer's Reducer after the second development, but the positive silver image is not removed owing to the protective action of the dye image. Two developing formulae are given, one containing diethyl-p-phenylenediamine as developing agent and the other 2-amino-5-diethylaminotoluene hydrochloride. Sodium hydroxide is used in both formulae. Other developing agents referred to are p-phenylenediamine and dimethyl-p-phenylenediamine. The latent image is produced either in taking or in printing, and a metol-hydroquinone first developer is used. The second exposure is effected either from the emulsion side or through the support and may be controlled to permit of a constant developing time. Specification 176,357, [Class 98 (ii)], is referred to.
GB10778/39A 1938-04-06 1939-04-06 Improvements in the production of reversed photographic images Expired GB527332A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US200507A US2193023A (en) 1938-04-06 1938-04-06 Photographic reversal process

Publications (1)

Publication Number Publication Date
GB527332A true GB527332A (en) 1940-10-07

Family

ID=22742010

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10778/39A Expired GB527332A (en) 1938-04-06 1939-04-06 Improvements in the production of reversed photographic images

Country Status (3)

Country Link
US (1) US2193023A (en)
FR (1) FR852757A (en)
GB (1) GB527332A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2673150A (en) * 1952-09-12 1954-03-23 Technicolor Motion Picture Masking of photographic color film
US3666648A (en) * 1969-11-05 1972-05-30 Ibm In-situ reclamation of master patterns for printing microcircuit images on reversely sensitized material
US4312938A (en) * 1979-07-06 1982-01-26 Drexler Technology Corporation Method for making a broadband reflective laser recording and data storage medium with absorptive underlayer
US20070092809A1 (en) * 2005-10-21 2007-04-26 Eastman Kodak Company Fabrication of rear projection surface using reversal emulsion

Also Published As

Publication number Publication date
US2193023A (en) 1940-03-12
FR852757A (en) 1940-03-02

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