GB742330A - Improvements in single-powder photographic developers - Google Patents
Improvements in single-powder photographic developersInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE536991A (en) * | 1954-04-01 | |||
BE543030A (en) * | 1954-11-26 | |||
US2816026A (en) * | 1954-11-26 | 1957-12-10 | Eastman Kodak Co | Stabilizing agents for single powder photographic developers |
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 |
-
1952
- 1952-06-26 US US295805A patent/US2649376A/en not_active Expired - Lifetime
-
1953
- 1953-06-26 GB GB17748/53A patent/GB742330A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2649376A (en) | 1953-08-18 |
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