GB702255A - Improvements in mixed grain photographic emulsions and sensitive materials employingthem - Google Patents

Improvements in mixed grain photographic emulsions and sensitive materials employingthem

Info

Publication number
GB702255A
GB702255A GB18311/52A GB1831152A GB702255A GB 702255 A GB702255 A GB 702255A GB 18311/52 A GB18311/52 A GB 18311/52A GB 1831152 A GB1831152 A GB 1831152A GB 702255 A GB702255 A GB 702255A
Authority
GB
United Kingdom
Prior art keywords
grains
sensitized
silver halide
dyes
dye
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
GB18311/52A
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 GB702255A publication Critical patent/GB702255A/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
    • G03C7/3041—Materials with specific sensitometric characteristics, e.g. gamma, density
    • 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
    • G03C1/00—Photosensitive materials
    • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
    • G03C1/08—Sensitivity-increasing substances
    • G03C1/10—Organic substances
    • G03C1/12—Methine and polymethine dyes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)

Abstract

702,255. Mixed grain colour photographic emulsions. KODAK, Ltd. Oct. 29, 1949 [Oct. 30, 1948], No. 18311/52. Divided out of 702,200. Class 98(2) Two sets of silver halide grains of substantially the same inherent speed to white light are respectively sensitized to different regions, as in the red and green, of the spectrum by dyes each having two different spectral absorptions and being capable of conferring two different sensitizing maxima on silver halide grains when used in a high and a low concentration, the dyes being used in high concentrations whereby diffusion of each dye from the grains intended to be sensitized to grains not intended to be sensitized thereby sensitizes the latter at the other sensitizing maximum. A gelatin layer containing such sensitized grains may be overcoated with a layer containing high contrast blue sensitive silver halide grains and a removable yellow dye, or the emulsion itself may contain a set of such blue sensitive grains with omission of the yellow filter dye. In four examples the emulsions are the same as those described in the original Specification 702,200. Other suitable sensitizing dyes are described with reference to Specifications 378,870, [Group IV], 378,885; 380,140, 408,277, [both in Group IV], 496,116, 540,444 and 592,267.
GB18311/52A 1948-10-30 1949-10-29 Improvements in mixed grain photographic emulsions and sensitive materials employingthem Expired GB702255A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US57592A US2592243A (en) 1948-10-30 1948-10-30 Method of selectively exposing the grains of a mixed grain photographic emulsion

Publications (1)

Publication Number Publication Date
GB702255A true GB702255A (en) 1954-01-13

Family

ID=22011554

Family Applications (2)

Application Number Title Priority Date Filing Date
GB27762/49A Expired GB702200A (en) 1948-10-30 1949-10-29 Improvements in mixed grain colour photography
GB18311/52A Expired GB702255A (en) 1948-10-30 1949-10-29 Improvements in mixed grain photographic emulsions and sensitive materials employingthem

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB27762/49A Expired GB702200A (en) 1948-10-30 1949-10-29 Improvements in mixed grain colour photography

Country Status (4)

Country Link
US (1) US2592243A (en)
BE (1) BE491769A (en)
FR (1) FR1017762A (en)
GB (2) GB702200A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2676103A (en) * 1950-03-18 1954-04-20 Fr Corp Process and composition for use in color photography
BE514795A (en) * 1951-10-17
DE1113873B (en) * 1959-01-17 1961-09-14 Wolfen Filmfab Veb Process for sensitizing halide silver emulsions
US3992210A (en) * 1973-06-05 1976-11-16 E. I. Du Pont De Nemours And Company Silver halide films with controlled gradient balance
IT1018702B (en) * 1974-06-26 1977-10-20 Minnesota Mining & Mfg PHOTOGRAPHIC COPULANTS PIVALILACETA NILIDIC PHOTOGRAPHIC ELEMENTS THAT INCLUDE SUCH COPULANTS E.O THE COLORS FORMED FOR THE CHROME GENO DEVELOPMENT OF SAID COPULANTS AND METHOD FOR FORMING A PHOTOGRAPHIC IMAGE CA WITH DYES IN THE PRESENCE OF DETECT COOLANTS
GB9626281D0 (en) * 1996-12-18 1997-02-05 Kodak Ltd Photographic high contrast silver halide material

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1980941A (en) * 1927-11-12 1934-11-13 Leopold D Mannes Color photography
US2320418A (en) * 1935-06-22 1943-06-01 Gen Aniline & Film Corp Color photographs
GB507841A (en) * 1937-11-19 1939-06-19 Kodak Ltd Process of producing coloured images in multilayer photographic elements
GB540444A (en) * 1940-01-11 1941-10-17 Eastman Kodak Co Improvements in colour photography and materials therefor
US2318597A (en) * 1941-01-03 1943-05-11 Eastman Kodak Co Photographic printing material

Also Published As

Publication number Publication date
GB702200A (en) 1954-01-13
FR1017762A (en) 1952-12-18
US2592243A (en) 1952-04-08
BE491769A (en)

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