GB492162A - Improvements in or relating to photographic light sensitive elements - Google Patents

Improvements in or relating to photographic light sensitive elements

Info

Publication number
GB492162A
GB492162A GB4496/37A GB449637A GB492162A GB 492162 A GB492162 A GB 492162A GB 4496/37 A GB4496/37 A GB 4496/37A GB 449637 A GB449637 A GB 449637A GB 492162 A GB492162 A GB 492162A
Authority
GB
United Kingdom
Prior art keywords
emulsion
emulsions
referred
compound
group
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
GB4496/37A
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 GB492162A publication Critical patent/GB492162A/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
    • G03C1/00—Photosensitive materials
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • 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
    • 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
    • G03C7/26—Silver halide emulsions for subtractive colour processes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Laminated Bodies (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Colloid Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

492,162. Photographic emulsions. KODAK, Ltd. Feb. 15, 1937, No. 4496. Convention date, June 9, 1936. Drawings to Specification. [Class 98 (ii)] Alteration in acidity or hydrogen on concentration of photographic gelatine emulsion layers is prevented by buffering the emulsion in the range pH5 to pH10 by adding to the wet emulsion before coating 0À05 to 1À0 per cent by weight on the wet emulsion of a substantially colourless organic compound or compounds having a carboxylic acid group, or a sulphonic acid group, or a phenolic group, or an enolic keto group, the compound being inert with respect to silver halides and having a pKa value between 5À5 and 9À5, and sufficient water solubility to avoid crystallization in air-dry gelatine. A suitable amount of the compound is 0À15 per cent by weight on the wet emulsion. Compounds referred to are substituted or unsubstituted aliphatic polybasic carboxylic acids, particularly malic, malonic, isopropylmalonic, diethylmalonic, dipropylmalonic, maleic, mucic, tricarballylic, pyromellitic, dcamphoric and diethylsuccinic acids, aliphatic ketones such as acetylacetone and acetonylacetone, a-amino-n-butyric acid, taurine, 2 : 4- dichlorophenol, trichlorophenol, iodosobenzoic acid, p - hydroxybenzaldehyde, phloroglucinol, resorcinol, alpha-naphthol, and guaiacol. The use of p-nitrophenol, and hydroxylamine hydrochloride also is referred to. Positive, negative, X-ray. and print-out emulsions may be treated, and the silver halides used in the emulsions may be silver chloride, bromide. or iodide. Specification 492,257 is referred to.
GB4496/37A 1936-02-15 1937-02-15 Improvements in or relating to photographic light sensitive elements Expired GB492162A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US64103A US2139767A (en) 1936-02-15 1936-02-15 Buffered photographic film
US84317A US2184023A (en) 1936-02-15 1936-06-09 Buffered photographic emulsion

Publications (1)

Publication Number Publication Date
GB492162A true GB492162A (en) 1938-09-15

Family

ID=21953584

Family Applications (3)

Application Number Title Priority Date Filing Date
GB4496/37A Expired GB492162A (en) 1936-02-15 1937-02-15 Improvements in or relating to photographic light sensitive elements
GB4494/37A Expired GB482633A (en) 1936-02-15 1937-02-15 Improvements in or relating to photographic light sensitive elements
GB21733/38A Expired GB492257A (en) 1936-02-15 1937-02-15 Improvements in or relating to photographic light sensitive elements

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB4494/37A Expired GB482633A (en) 1936-02-15 1937-02-15 Improvements in or relating to photographic light sensitive elements
GB21733/38A Expired GB492257A (en) 1936-02-15 1937-02-15 Improvements in or relating to photographic light sensitive elements

Country Status (3)

Country Link
US (2) US2139767A (en)
FR (1) FR825975A (en)
GB (3) GB492162A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2698245A (en) * 1946-04-13 1954-12-28 Polaroid Corp Photographic product and process for making a positive transfer image
US2448534A (en) * 1946-07-06 1948-09-07 Eastman Kodak Co Sensitized photographic cellulose ester silver halide emulsion
US2635048A (en) * 1948-07-06 1953-04-14 Polaroid Corp Photographic transfer product and process
US2857273A (en) * 1953-07-31 1958-10-21 Gen Aniline & Film Corp Photographic film having enhanced herschel effect susceptibility and the process using the same
US3220841A (en) * 1962-01-12 1965-11-30 Eastman Kodak Co Photographic film
US3123492A (en) * 1962-02-28 1964-03-03 Maffet
JPS6341853A (en) * 1986-08-07 1988-02-23 Fuji Photo Film Co Ltd Silver halide color photographic sensitive material

Also Published As

Publication number Publication date
US2184023A (en) 1939-12-19
FR825975A (en) 1938-03-18
GB482633A (en) 1938-04-01
US2139767A (en) 1938-12-13
GB492257A (en) 1938-09-15

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