GB615218A - Improvements in and relating to photographic colour developers and photographic colour development - Google Patents

Improvements in and relating to photographic colour developers and photographic colour development

Info

Publication number
GB615218A
GB615218A GB33443/45A GB3344345A GB615218A GB 615218 A GB615218 A GB 615218A GB 33443/45 A GB33443/45 A GB 33443/45A GB 3344345 A GB3344345 A GB 3344345A GB 615218 A GB615218 A GB 615218A
Authority
GB
United Kingdom
Prior art keywords
photographic colour
colour
coupler
aromatic amino
photographic
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
GB33443/45A
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.)
Gevaert Photo Producten NV
Original Assignee
Gevaert Photo Producten NV
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 Gevaert Photo Producten NV filed Critical Gevaert Photo Producten NV
Publication of GB615218A publication Critical patent/GB615218A/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
    • G03C7/36—Couplers containing compounds with active methylene groups

Landscapes

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

Abstract

615,218. Photographic colour development. GEVAERT PHOTO-PRODUCTEN N. V. Dec. 11, 1945, No. 33443. Convention date, March 17,1941. [Class 98 (ii)] A reducible silver salt image is colour developed with an aromatic amino developing agent in presence of a colour coupler of the formula (CN-CH2-CO-NH-N = )nX, wherein n is 1 or 2 and X is any organic residue containing no reactive methylene group and capable of forming a hydrazone by reaction with a hydrazine. The coupler may be in the developer or a silver halide emulsion layer. The usual aromatic amino developing agents may be used. Formulµ for suitable developing solutions incorporating the couplers are given. Compounds specified are the cyanacetylhydrazones of vanillin, piperonal, phenylacetaldehyde, crotonaldehyde, #-furylacrolein, terephthalaldehyde, pyruvic aldehyde, acetophenone, benzalacetone, mono-bromisatin, 5- nitro-7-methylisatin, cinnamaldehyde and ethyl alpha-phenylacetoacetate. Specification 590,637 is referred to.
GB33443/45A 1941-03-17 1945-12-11 Improvements in and relating to photographic colour developers and photographic colour development Expired GB615218A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG0103197 1941-03-17

Publications (1)

Publication Number Publication Date
GB615218A true GB615218A (en) 1949-01-04

Family

ID=7141695

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33443/45A Expired GB615218A (en) 1941-03-17 1945-12-11 Improvements in and relating to photographic colour developers and photographic colour development

Country Status (5)

Country Link
US (1) US2527476A (en)
BE (1) BE444782A (en)
FR (1) FR880244A (en)
GB (1) GB615218A (en)
NL (1) NL58029C (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2710851A (en) * 1951-08-22 1955-06-14 Monsanto Chemicals Cyanoacyl hydrazide resins
DE963297C (en) * 1954-07-13 1957-05-02 C Schleussner Fotowerke G M B Process for producing color photographic images by chromogenic development
NL246283A (en) * 1958-12-11
FR79706E (en) * 1959-11-13 1963-04-17

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1969479A (en) * 1931-05-11 1934-08-07 Eastman Kodak Co Method of producing color photographic images by development
GB458664A (en) * 1935-03-21 1936-12-21 Eastman Kodak Co Improvements in and relating to colour forming developers and processes of colour development
US2266442A (en) * 1937-04-10 1941-12-16 Eastman Kodak Co Color print by multiple color development
BE440740A (en) * 1940-03-13

Also Published As

Publication number Publication date
NL58029C (en) 1946-08-15
BE444782A (en) 1942-04-30
US2527476A (en) 1950-10-24
FR880244A (en) 1943-03-17

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