GB742330A - Improvements in single-powder photographic developers - Google Patents

Improvements in single-powder photographic developers

Info

Publication number
GB742330A
GB742330A GB17748/53A GB1774853A GB742330A GB 742330 A GB742330 A GB 742330A GB 17748/53 A GB17748/53 A GB 17748/53A GB 1774853 A GB1774853 A GB 1774853A GB 742330 A GB742330 A GB 742330A
Authority
GB
United Kingdom
Prior art keywords
alkali metal
boric
acid
june
bisulphite
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
GB17748/53A
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
Publication of GB742330A publication Critical patent/GB742330A/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
    • G03C5/265—Supplying of photographic processing chemicals; Preparation or packaging thereof of powders, granulates, tablets

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)

Abstract

742,330. Photographic developing compositions. KODAK, Ltd. June 26, 1953 [June 26, 1952], No. 17748/53. Addition to 729,694. Class 98 (2). A single-powder photographic developing composition contains an organic silver halide developing agent, a stabilizing agent which is boric anhydride, tetraboric acid, metaboric acid, a partially hydrated form of boric anhydride intermediate between boric anhydride and metaboric acid, an alkali metal bisulphite, or an alkali metal metabisulphite, a preservative which is an alkali metal sulphite or bisulphite, a buffer compound which is an alkali metal salt of boric, carbonic, or phosphoric acid, and an alkaline ingredient which is sodium or potassium hydroxide coated with 2 to 20 per cent by weight of phthalic anhydride. The composition may also contain potassium bromide. Examples of developing compositions are specified. Specifications 585,366, 698,311, 725,892, 729,388 and 729,694 are referred to.
GB17748/53A 1952-06-26 1953-06-26 Improvements in single-powder photographic developers Expired GB742330A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US295805A US2649376A (en) 1952-06-26 1952-06-26 Single powder developers containing stabilized alkali hydroxides

Publications (1)

Publication Number Publication Date
GB742330A true GB742330A (en) 1955-12-21

Family

ID=23139299

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17748/53A Expired GB742330A (en) 1952-06-26 1953-06-26 Improvements in single-powder photographic developers

Country Status (2)

Country Link
US (1) US2649376A (en)
GB (1) GB742330A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE536991A (en) * 1954-04-01
US2816026A (en) * 1954-11-26 1957-12-10 Eastman Kodak Co Stabilizing agents for single powder photographic developers
BE543030A (en) * 1954-11-26
BE553777A (en) * 1955-12-29
US5556736A (en) * 1993-11-11 1996-09-17 Konica Corporation Method for processing a silver halide color photographic light-sensitive material and producing a color image
US5948736A (en) * 1998-08-25 1999-09-07 Toxco, Inc. Dust free lithium hydroxide
US6653262B2 (en) * 2001-12-27 2003-11-25 Toxco, Inc. Dust free lithium hydroxide

Also Published As

Publication number Publication date
US2649376A (en) 1953-08-18

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