GB500613A - Improvements in colour developers and colour development - Google Patents

Improvements in colour developers and colour development

Info

Publication number
GB500613A
GB500613A GB35098/38A GB3509838A GB500613A GB 500613 A GB500613 A GB 500613A GB 35098/38 A GB35098/38 A GB 35098/38A GB 3509838 A GB3509838 A GB 3509838A GB 500613 A GB500613 A GB 500613A
Authority
GB
United Kingdom
Prior art keywords
colour
images
development
developing agent
silver halide
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
GB35098/38A
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 GB500613A publication Critical patent/GB500613A/en
Priority claimed from US308464A external-priority patent/US2301387A/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
    • 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
    • G03C7/407—Development processes or agents therefor
    • G03C7/413—Developers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

500,613. Photographic colour development. KODAK, Ltd. MAy 10, 1937, No. 35098/38. Convention date, May 9, 1936. Divided out of 500,826. [Class 98 (ii)] In a process of three-colour photography wherein component colour images in three silver halide emulsions on a single support are processed to coloured images, a dye image of improved gradation is produced by subjecting a developable silver salt image to the action of a colour developer containing also a non- coupling and non-colour-forming developing agent and subsequently removing the silver from the dye image produced. The component colour images may be formed in three layers of differentially sensitized silver halide emulsion on a single support or in two layers, one of which consists of a not specially sensitized silver halide emulsion while the other consists of a mixture of grains of silver halide emulsion respectively sensitized to the red and green regions of the spectrum. The colour developer may include either (a) a developing agent of which the product of oxidation on development couples with unoxidized developing agent, (b) a developing agent, for example a leuco dye, oxidized directy on development, or (c) a developing agent of which the oxidation product on development couples with a colour former. The addition of sulphite in colour development by coupling is omitted or limited to a minimum. The component images may be reversed silver salt images or images produced by bleaching developed and fixed images. Specifications 498,869, 498,870, 498,871, 498,875, 501,000, 501,001 and 501,002 are referred to.
GB35098/38A 1936-05-09 1937-05-10 Improvements in colour developers and colour development Expired GB500613A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT500613X 1936-05-09
US308464A US2301387A (en) 1939-12-09 1939-12-09 Reducing aerial oxidation of photographic developers

Publications (1)

Publication Number Publication Date
GB500613A true GB500613A (en) 1939-02-10

Family

ID=25608346

Family Applications (2)

Application Number Title Priority Date Filing Date
GB35098/38A Expired GB500613A (en) 1936-05-09 1937-05-10 Improvements in colour developers and colour development
GB17444/40A Expired GB545732A (en) 1936-05-09 1940-12-09 Improvements in and relating to photographic colour developers

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB17444/40A Expired GB545732A (en) 1936-05-09 1940-12-09 Improvements in and relating to photographic colour developers

Country Status (2)

Country Link
FR (1) FR950647A (en)
GB (2) GB500613A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941599A (en) * 1972-11-15 1976-03-02 Minnesota Mining And Manufacturing Company Method for obtaining a color contrast photographic image, photographic element and development composition suitable for the realization of said method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE530383A (en) * 1951-04-10

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941599A (en) * 1972-11-15 1976-03-02 Minnesota Mining And Manufacturing Company Method for obtaining a color contrast photographic image, photographic element and development composition suitable for the realization of said method

Also Published As

Publication number Publication date
GB545732A (en) 1942-06-10
FR950647A (en) 1949-10-03

Similar Documents

Publication Publication Date Title
GB470074A (en) Production of coloured photographic images by development
GB1421126A (en) Processing silver halide photographic materials
GB516059A (en) Light-sensitive material for colour photography
GB516514A (en) Improvements in and relating to the photographic reproduction of coloured objects
GB500613A (en) Improvements in colour developers and colour development
GB637879A (en) Method of color correction for photographic multi-layer negative color film
GB517416A (en) Improvements in and relating to the photographic reproduction of coloured objects
US2244589A (en) Photographic color process
GB804662A (en) Improvements in sensitive materials for colour photography
US2311015A (en) Method of producing dye images
GB878149A (en) Improvements in the preparation of photographic dye images
GB702200A (en) Improvements in mixed grain colour photography
GB421727A (en) An improved method of producing photographic dyestuff images
GB511770A (en) Improvements in colour photography
US2541865A (en) Process for producing multilayer color negatives containing masking images for colorcorrection purposes
GB539781A (en) Improvements in methods of producing coloured photographic records
US2163325A (en) Color photography or cinematography
Weissberger A Chemist's View of Color Photography: How does color photography work? What is required of the light-sensitive material? What is the origin of the image dyes?
GB483020A (en) Improvements in colour photography and kinematography
GB404856A (en) Improvements in the photographic production of multi-colour pictures
GB501040A (en) Improvements in colour photographic development
GB507151A (en) Coloured photographic multilayer material
US2194293A (en) Process of making photographic prints in color
GB672492A (en) Negative-positive colour photography involving colour connection
US3032413A (en) Colour photographic processes and materials