GB755655A - Process of colour development in colour photography - Google Patents

Process of colour development in colour photography

Info

Publication number
GB755655A
GB755655A GB6768/54A GB676854A GB755655A GB 755655 A GB755655 A GB 755655A GB 6768/54 A GB6768/54 A GB 6768/54A GB 676854 A GB676854 A GB 676854A GB 755655 A GB755655 A GB 755655A
Authority
GB
United Kingdom
Prior art keywords
colour
emulsion
coupler
contrast
gives
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
GB6768/54A
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 GB755655A publication Critical patent/GB755655A/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
    • G03C7/32—Colour coupling substances
    • 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

Landscapes

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

Abstract

755,655. Photographic colour development. KODAK, Ltd. March 9, 1954 [March 13, 1953], No. 6768/54. Drawings to Specification. Class 98 (2). To reduce excessive graininess, sharpness and contrast of colour developed dye images without reduction of the silver salt content of the emulsion relative to black and white materials and without the loss of speed which' would be involved by use of a fine-grained type of emulsion, an exposed three layer colour-formd material is developed with a primary aromatic amino developer in the presence of an imageforming coupler and also of a competing coupler which gives a soluble dye image removable by washing without causing diffusion of the desired insoluble dye image. The competing coupler may be used either in one or more of the emulsion layers or in the developer. As illustrated with reference to three lots of fast coarse grained red-sensitive emulsion containing the coupler 2-(diamylphenoxyacetamido) - 4 : 6 - dichloro - 5 - methyl phenol dispersed by the method of Specification 541,589, the first with 30 mg. of silver halide per square foot on red exposure, normal direct colour development and silver removal gives a cyan image of normal contrast but undesired graininess, the second with 400 mg. per square foot on similar procedure gives an image of excessive contrast, while the third, similar in all respects to the second except for the addition of H acid as competing coupler to the colour developer, gives contrast as of the first emulsion but materially reduced graininess. In multilayer reversal procedure 1-naphthol- 3 : 6 : 8 - trisulphonic acid in the colour developer with two to four times the normal amount of silver halide in the emulsion produces superior results. The process is applicable to multilayer films containing coloured colour couplers, as of Specifications 599,377 and 617,247. Competing couplers other than the above are listed. Specifications 524,154, 524,554, 524,555 and 539,510 also are referred to.
GB6768/54A 1953-03-13 1954-03-09 Process of colour development in colour photography Expired GB755655A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US342066A US2689793A (en) 1953-03-13 1953-03-13 Controlling grain and contrast in color photography

Publications (1)

Publication Number Publication Date
GB755655A true GB755655A (en) 1956-08-22

Family

ID=23340178

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6768/54A Expired GB755655A (en) 1953-03-13 1954-03-09 Process of colour development in colour photography

Country Status (5)

Country Link
US (1) US2689793A (en)
BE (1) BE527178A (en)
DE (1) DE962666C (en)
FR (1) FR1103430A (en)
GB (1) GB755655A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE560907A (en) * 1956-09-18
BE561008A (en) * 1956-09-26
BE589419A (en) * 1959-04-06
US3132946A (en) * 1960-01-11 1964-05-12 Eastman Kodak Co Contact screens for photogravure
US4002477A (en) * 1973-11-28 1977-01-11 Eastman Kodak Company Diffusion transfer processes and elements using or containing inert transitional metal complex oxidizing agents
JPS53293B2 (en) * 1973-12-24 1978-01-07
JPS5250230A (en) * 1975-10-20 1977-04-22 Fuji Photo Film Co Ltd Method for forming color photographic image
JPS55149943A (en) * 1979-05-09 1980-11-21 Fuji Photo Film Co Ltd Photographic image forming method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454001A (en) * 1945-11-08 1948-11-16 Gen Aniline & Film Corp Control of contrast with aromatic diamine color developers

Also Published As

Publication number Publication date
US2689793A (en) 1954-09-21
BE527178A (en)
DE962666C (en) 1957-04-11
FR1103430A (en) 1955-11-03

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