GB776082A - Improvements in photographic processing solutions - Google Patents

Improvements in photographic processing solutions

Info

Publication number
GB776082A
GB776082A GB3461954A GB3461954A GB776082A GB 776082 A GB776082 A GB 776082A GB 3461954 A GB3461954 A GB 3461954A GB 3461954 A GB3461954 A GB 3461954A GB 776082 A GB776082 A GB 776082A
Authority
GB
United Kingdom
Prior art keywords
grams per
per litre
calculated
sodium
solution
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
GB3461954A
Inventor
Eric Thomas Smith
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.)
Kodak Ltd
Original Assignee
Kodak 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 Kodak Ltd filed Critical Kodak Ltd
Priority to GB3461954A priority Critical patent/GB776082A/en
Publication of GB776082A publication Critical patent/GB776082A/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
    • G03C5/38—Fixing; Developing-fixing; Hardening-fixing
    • G03C5/383—Developing-fixing, i.e. mono-baths

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

776,082. Photographic developing solutions. KODAK, Ltd. Nov. 29,1955 [Nov. 30, 1954], No. 34619/54. Class 98(2) A photographic developing solution comprises catechol as the developing agent together with at least 9 grams per litre of caustic alkali (calculated as NaOH) and at least 40 grams per litre of sodium thiosulphate (calculated as Na 2 SO 3 ) and 75 to 175 grams per litre of sodium sulphite (calculated at Na 2 SO 3 ). At least 60 grams per litre of sodium thiosulphate may be used, and an amount of caustic alkali giving from 9 to 16 grams per litre (calculated as NaOH) uncombined with any sodium bisulphite which may have been used may be incorporated. After processing in the solution, a print can be immediately wiped without rinsing or washing, and dried. An example of a suitable solution is given, and stock solutions for mixing to obtain a working solution are specified, that containing the catechol also including sodium sulphite and bisulphite.
GB3461954A 1954-11-30 1954-11-30 Improvements in photographic processing solutions Expired GB776082A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3461954A GB776082A (en) 1954-11-30 1954-11-30 Improvements in photographic processing solutions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3461954A GB776082A (en) 1954-11-30 1954-11-30 Improvements in photographic processing solutions

Publications (1)

Publication Number Publication Date
GB776082A true GB776082A (en) 1957-06-05

Family

ID=10367901

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3461954A Expired GB776082A (en) 1954-11-30 1954-11-30 Improvements in photographic processing solutions

Country Status (1)

Country Link
GB (1) GB776082A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3243296A (en) * 1963-02-18 1966-03-29 Fugi Shashin Film Kabushiki Ka Method for stabilizing developed photosensitive materials
US3819378A (en) * 1972-03-10 1974-06-25 Gen Film Dev Corp Fine grain high speed photographic processing monobath composition

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3243296A (en) * 1963-02-18 1966-03-29 Fugi Shashin Film Kabushiki Ka Method for stabilizing developed photosensitive materials
US3819378A (en) * 1972-03-10 1974-06-25 Gen Film Dev Corp Fine grain high speed photographic processing monobath composition

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