GB459665A - Improvements in photographic developers - Google Patents

Improvements in photographic developers

Info

Publication number
GB459665A
GB459665A GB19957/35A GB1995735A GB459665A GB 459665 A GB459665 A GB 459665A GB 19957/35 A GB19957/35 A GB 19957/35A GB 1995735 A GB1995735 A GB 1995735A GB 459665 A GB459665 A GB 459665A
Authority
GB
United Kingdom
Prior art keywords
photographic developers
developers
photographic
chlorophenylhydrazine
pyrazolone
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
GB19957/35A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Publication of GB459665A publication Critical patent/GB459665A/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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/29—Development processes or agents therefor
    • G03C5/30—Developers
    • G03C5/3028—Heterocyclic compounds
    • G03C5/3035—Heterocyclic compounds containing a diazole ring
    • 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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/29—Development processes or agents therefor
    • G03C5/30—Developers
    • 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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/29—Development processes or agents therefor
    • G03C5/30—Developers
    • G03C5/3028—Heterocyclic compounds

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Plural Heterocyclic Compounds (AREA)

Abstract

1-p-Chlorophenyl-3-methyl-5-pyrazolone is prepared by mixing p-chlorophenylhydrazine and ethyl acetoacetate in the absence of a solvent, removing the water produced, and heating to split off alcohol.
GB19957/35A 1935-06-07 1935-07-12 Improvements in photographic developers Expired GB459665A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI0052514 1935-06-07

Publications (1)

Publication Number Publication Date
GB459665A true GB459665A (en) 1937-01-12

Family

ID=7193366

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19957/35A Expired GB459665A (en) 1935-06-07 1935-07-12 Improvements in photographic developers

Country Status (4)

Country Link
US (1) US2163781A (en)
BE (1) BE415830A (en)
FR (1) FR807002A (en)
GB (1) GB459665A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1041357B (en) * 1957-07-31 1958-10-16 Agfa Ag Process and multilayer material for the production of yellow dye images by color development

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2895825A (en) * 1954-03-18 1959-07-21 Agfa Ag Production of photographic colour images with heterocyclic developers
BE563474A (en) * 1956-12-31 1960-06-17
US4128425A (en) * 1977-05-06 1978-12-05 Polaroid Corporation Photographic developers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1041357B (en) * 1957-07-31 1958-10-16 Agfa Ag Process and multilayer material for the production of yellow dye images by color development

Also Published As

Publication number Publication date
BE415830A (en)
US2163781A (en) 1939-06-27
FR807002A (en) 1936-12-31

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