GB1057365A - Photographic developer compositions - Google Patents

Photographic developer compositions

Info

Publication number
GB1057365A
GB1057365A GB3997962A GB3997962A GB1057365A GB 1057365 A GB1057365 A GB 1057365A GB 3997962 A GB3997962 A GB 3997962A GB 3997962 A GB3997962 A GB 3997962A GB 1057365 A GB1057365 A GB 1057365A
Authority
GB
United Kingdom
Prior art keywords
solution
photographic developer
pyrazolidone
acid
oct
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
GB3997962A
Inventor
Howard Colin Jones
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.)
May and Baker Ltd
Original Assignee
May and Baker 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 May and Baker Ltd filed Critical May and Baker Ltd
Priority to GB3997962A priority Critical patent/GB1057365A/en
Priority to DE19631447754 priority patent/DE1447754A1/en
Publication of GB1057365A publication Critical patent/GB1057365A/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
    • G03C5/264—Supplying of photographic processing chemicals; Preparation or packaging thereof
    • G03C5/266—Supplying of photographic processing chemicals; Preparation or packaging thereof of solutions or concentrates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)

Abstract

1,057,365. Photographic developer compositions. MAY & BAKER Ltd. Oct. 22, 1963 [Oct. 22, 1962], No. 39979/62. Heading G2C. A photographic developer is in the form of two solutions which, when mixed, yield a developer having a pH above 10, one solution comprising 1-phenyl-3-pyrazolidone dissolved in a water-miscible, water-containing organic solvent, in which 1-phenyl-3-pyrazolidone is at least 25% w/v soluble at 25‹C., and the other comprising an aqueous solution containing a polyhydric phenol such as hydroquinone, alkali such as sodium or potassium hydroxide or carbonate, an inorganic sulphite, an antifoggant and a weak acid such as boric acid as buffering agent. This solution also may contain N-hydroxyethyl-ethylene-diamine-N, N<1>, N<1> -triacetic acid trisodium salt. The organic solvent in the first solution may be formic acid or dimethyl formamide.
GB3997962A 1962-10-22 1962-10-22 Photographic developer compositions Expired GB1057365A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3997962A GB1057365A (en) 1962-10-22 1962-10-22 Photographic developer compositions
DE19631447754 DE1447754A1 (en) 1962-10-22 1963-10-18 Photographic developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3997962A GB1057365A (en) 1962-10-22 1962-10-22 Photographic developer compositions

Publications (1)

Publication Number Publication Date
GB1057365A true GB1057365A (en) 1967-02-01

Family

ID=10412544

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3997962A Expired GB1057365A (en) 1962-10-22 1962-10-22 Photographic developer compositions

Country Status (2)

Country Link
DE (1) DE1447754A1 (en)
GB (1) GB1057365A (en)

Also Published As

Publication number Publication date
DE1447754A1 (en) 1969-01-30

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