GB991412A - Chemical compositions - Google Patents

Chemical compositions

Info

Publication number
GB991412A
GB991412A GB1605461A GB1605461A GB991412A GB 991412 A GB991412 A GB 991412A GB 1605461 A GB1605461 A GB 1605461A GB 1605461 A GB1605461 A GB 1605461A GB 991412 A GB991412 A GB 991412A
Authority
GB
United Kingdom
Prior art keywords
salt
ethylene diamine
acid
bleach
ferric
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
GB1605461A
Inventor
Kurt Israel Jacobson
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.)
Pavelle Ltd
Original Assignee
Pavelle 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 Pavelle Ltd filed Critical Pavelle Ltd
Priority to GB1605461A priority Critical patent/GB991412A/en
Priority to FR896141A priority patent/FR1321785A/en
Publication of GB991412A publication Critical patent/GB991412A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03CPHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C7/00Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/30Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
    • G03C7/42Bleach-fixing or agents therefor ; Desilvering processes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

991,412. Photographic bleach fix baths. PAVELLE Ltd. April 17,1962 [May 3, 1961], No. 16054/61. Heading G2C. A bleach fixing bath composition comprises a ferric salt of an alkylene amine polyacetic acid, a silver halide solvent and a non-delate salt (i.e. an alkali metal, ammonium or amine salt) of an alkylene diamine polyacetic acid, the non-chelate salt being present in an amount at least sufficient to give a weight ratio of non-chelate to ferric salt of 1:3. The polyacetic acid may be ethylene diamine N-(#-hydroxy-ethyl)triacetic acid. Silver halide solvents specified are alkali metal or ammonium thiosulphates, thiocyanates or cyanides or thiourea. In the example, a bleach-fix bath containing ammonium thiosulphate and thiocyanate, disodium ethylene diamine tetra-acetic acid, disodium ferric ethylene diamine tetra-acetate and thiourea is prepared. Specification 774,545 is referred to.
GB1605461A 1961-05-03 1961-05-03 Chemical compositions Expired GB991412A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1605461A GB991412A (en) 1961-05-03 1961-05-03 Chemical compositions
FR896141A FR1321785A (en) 1961-05-03 1962-05-02 Composition and process for bleaching and fixing photographic materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1605461A GB991412A (en) 1961-05-03 1961-05-03 Chemical compositions

Publications (1)

Publication Number Publication Date
GB991412A true GB991412A (en) 1965-05-05

Family

ID=10070312

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1605461A Expired GB991412A (en) 1961-05-03 1961-05-03 Chemical compositions

Country Status (1)

Country Link
GB (1) GB991412A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3658535A (en) * 1967-12-27 1972-04-25 Agfa Gevaert Nv Photography
EP0430000A1 (en) * 1989-12-01 1991-06-05 Agfa-Gevaert AG Bleach bath

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3658535A (en) * 1967-12-27 1972-04-25 Agfa Gevaert Nv Photography
EP0430000A1 (en) * 1989-12-01 1991-06-05 Agfa-Gevaert AG Bleach bath

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