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GB1013447A - Photographic developers - Google Patents

Photographic developers

Info

Publication number
GB1013447A
GB1013447A GB2583/63A GB258363A GB1013447A GB 1013447 A GB1013447 A GB 1013447A GB 2583/63 A GB2583/63 A GB 2583/63A GB 258363 A GB258363 A GB 258363A GB 1013447 A GB1013447 A GB 1013447A
Authority
GB
United Kingdom
Prior art keywords
photographic developers
developers
photographic
hydrazo
nitropyridine
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
GB2583/63A
Inventor
David William Crighton Ramsay
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.)
Ilford Imaging UK Ltd
Original Assignee
Ilford 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 Ilford Ltd filed Critical Ilford Ltd
Priority to GB2583/63A priority Critical patent/GB1013447A/en
Priority to US338015A priority patent/US3266899A/en
Priority to FR960896A priority patent/FR1380163A/en
Priority to DE19641447716 priority patent/DE1447716A1/en
Priority to CH66164A priority patent/CH442002A/en
Priority to BE642789A priority patent/BE642789A/xx
Publication of GB1013447A publication Critical patent/GB1013447A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Pyridine Compounds (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

2,21 - Hydrazo - pyridine - 1,11 - dioxide is prepared by hydrogenating 2-nitropyridine-1-oxide in alcohol with a palladium/strontium carbonate catalyst.
GB2583/63A 1963-01-21 1963-01-21 Photographic developers Expired GB1013447A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB2583/63A GB1013447A (en) 1963-01-21 1963-01-21 Photographic developers
US338015A US3266899A (en) 1963-01-21 1964-01-16 Photographic developers
FR960896A FR1380163A (en) 1963-01-21 1964-01-20 New photographic developers
DE19641447716 DE1447716A1 (en) 1963-01-21 1964-01-20 Photographic developer composition
CH66164A CH442002A (en) 1963-01-21 1964-01-21 Photographic developer
BE642789A BE642789A (en) 1963-01-21 1964-01-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2583/63A GB1013447A (en) 1963-01-21 1963-01-21 Photographic developers

Publications (1)

Publication Number Publication Date
GB1013447A true GB1013447A (en) 1965-12-15

Family

ID=9742132

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2583/63A Expired GB1013447A (en) 1963-01-21 1963-01-21 Photographic developers

Country Status (5)

Country Link
US (1) US3266899A (en)
BE (1) BE642789A (en)
CH (1) CH442002A (en)
DE (1) DE1447716A1 (en)
GB (1) GB1013447A (en)

Also Published As

Publication number Publication date
DE1447716A1 (en) 1968-11-28
US3266899A (en) 1966-08-16
BE642789A (en) 1964-05-15
CH442002A (en) 1967-08-15

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