GB720812A - Improvements in photographic developers - Google Patents

Improvements in photographic developers

Info

Publication number
GB720812A
GB720812A GB7057/53A GB705753A GB720812A GB 720812 A GB720812 A GB 720812A GB 7057/53 A GB7057/53 A GB 7057/53A GB 705753 A GB705753 A GB 705753A GB 720812 A GB720812 A GB 720812A
Authority
GB
United Kingdom
Prior art keywords
sulphonic acid
phenylenediamine
quinoline
developer
march
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
GB7057/53A
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 GB720812A publication Critical patent/GB720812A/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

720,812. Photographic developers. KODAK, Ltd. March 13, 1953 [March 14, 1952], No. 7057/53. Class 98 (2). A photographic developing solution comprises an alkaline solution of a silver halide developing agent (e.g. p-phenylenediamine, diethyl - p - phenylenediamine, 2 - amino -5 - diethylaminotoluene, hydroquinone, or N - methyl - p - aminophenol), an alkali metal sulphite (e.g. sodium or potassium sulphite or potassium bisulphite), and an 8 - hydroxy - quinoline - 5 - sulphonic acid (e.g. 8 - hydroxy - quinoline - 5 - sulphonic acid itself) or its 7 - chloro-, 7 - bromo -, or 6 - methyl - deriva - ' tives). The alkali may be sodium carbonate, hydroxide, or metaborate, and the developer may contain a primary aliphatic amine such as ethylenediamine, guanidine, or ethanolamine, or morpholine. The use of triglycin is referred to. The 8-hydroxyquinoline-5-sulphonic acid may be incorporated in the emulsion or in an overcoating, intermediate, or backing layer. Examples of developer formulµ are given. Specification 541,589 is referred to.
GB7057/53A 1952-03-14 1953-03-13 Improvements in photographic developers Expired GB720812A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US276676A US2691588A (en) 1952-03-14 1952-03-14 Photographic developers containing 8-hydroxyquinolines

Publications (1)

Publication Number Publication Date
GB720812A true GB720812A (en) 1954-12-29

Family

ID=23057637

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7057/53A Expired GB720812A (en) 1952-03-14 1953-03-13 Improvements in photographic developers

Country Status (3)

Country Link
US (1) US2691588A (en)
FR (1) FR1072957A (en)
GB (1) GB720812A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386825A (en) * 1957-07-02 1968-06-04 Polaroid Corp Photographic product containing zinc
BE625436A (en) * 1961-11-29
US3335004A (en) * 1963-12-09 1967-08-08 Eastman Kodak Co Method for stabilization processing of color emulsions
JPS5942535A (en) * 1982-09-02 1984-03-09 Fuji Photo Film Co Ltd Silver halide photosensitive material

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE421930A (en) * 1936-06-25
US2268419A (en) * 1938-10-28 1941-12-30 Us Rubber Co Antiager
US2381863A (en) * 1943-05-01 1945-08-14 Monsanto Chemicals Method of fungusproofing textiles
US2486440A (en) * 1946-01-10 1949-11-01 Gen Aniline & Film Corp Production of phenazonium dyestuff images
US2596978A (en) * 1947-09-17 1952-05-20 Searle & Co 8-hydroxy-1, 2, 3, 4-tetrahydroquinoline as a silver halide developer
US2544649A (en) * 1949-01-14 1951-03-13 Frederick C Bersworth Caustic alkali composition of matter and its use as a polyvalent metal precipitationinhibitor

Also Published As

Publication number Publication date
US2691588A (en) 1954-10-12
FR1072957A (en) 1954-09-17

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