GB565146A - Improvements relating to photographic fixing solutions - Google Patents
Improvements relating to photographic fixing solutionsInfo
- Publication number
- GB565146A GB565146A GB16827/43A GB1682743A GB565146A GB 565146 A GB565146 A GB 565146A GB 16827/43 A GB16827/43 A GB 16827/43A GB 1682743 A GB1682743 A GB 1682743A GB 565146 A GB565146 A GB 565146A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- thiocyanate
- polyvinyl
- thiourea
- esters
- 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
- G03C5/38—Fixing; Developing-fixing; Hardening-fixing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
565,146. Photographic fixing compositions. KODAK, Ltd. (Eastman Kodak Co., Eaton, G. T., and Crabtree, J. I.). April 23, 1943, Nos. 16827 [divided out of 565,135 under which a Specification was laid open to inspection under Sect. 91 on April 17, 1944], and 16828. [Class 98 (ii)] A fixing solution for a photographic silver salt emulsion in which the binder is other than gelatine (e.g. cellulose nitrate, acetate, or acetate-butyrate, polyvinyl acetaldehyde, propionaldehyde, or butyraldehyde acetals ; polyvinyl alcohol; polyvinyl esters, e.g. partially hydrolyzed polyvinyl acetate ; or mixed polyvinyl acetal-esters) comprises a thiocyanate (e.g. inorganic thiocyanates such as sodium, potassium, or ammonium thiocyanates or organic thiocyanates such as thiocyanocatechol) and an aliphatic organic compound containing in the molecule two carbon attached NH2 groups, e.g. thiourea or ethylene diamine. The polyvinyl acetates and other esters may contain above 71 per cent ester by weight calculated as vinyl ester. Some gelatine may be present in the binder. The solution may contain between 6 and 50 per cent of the thiocyanate and between 0.03 and 0.25 per cent of thiourea, or between 2 to 8 per cent thiourea and 0.1 to 0.5 per cent thiocyanate. With ethylene diamine, the solution may contain between 10 to 50 per cent thiocyanate and between 1 to 50 per cent ethylene diamine. The emulsion may be a silver bromide, chloride, bromiodide, chlorobromide, or chlorobromiodide emulsion, and a thiocyanate may be incorporated in the developer as described in Specification 565,135. In an example, a fixing bath contains 50 to 100 grams of sodium thiocyanate and 5 grams of thiourea per litre. Specifications 527,283, 531,579, 543,855 and 551,659 also are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US491914A US2425363A (en) | 1943-06-23 | 1943-06-23 | Procedure for fixing nongelating emulsions and improved nongelatin emulsion fixing baths |
Publications (1)
Publication Number | Publication Date |
---|---|
GB565146A true GB565146A (en) | 1944-10-27 |
Family
ID=23954187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB16827/43A Expired GB565146A (en) | 1943-06-23 | 1943-04-23 | Improvements relating to photographic fixing solutions |
Country Status (3)
Country | Link |
---|---|
US (1) | US2425363A (en) |
FR (1) | FR926080A (en) |
GB (1) | GB565146A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2857272A (en) * | 1954-09-28 | 1958-10-21 | Rca Corp | Electrostatic printing |
US2857271A (en) * | 1954-09-28 | 1958-10-21 | Rca Corp | Electrostatic printing process for producing photographic transparencies |
US3259495A (en) * | 1962-04-05 | 1966-07-05 | Itek Corp | Photothermographic data processing composition, method and article |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB451030A (en) * | 1934-10-27 | 1936-07-28 | Ig Farbenindustrie Ag | Improvements in photographic developers |
US2147441A (en) * | 1935-10-31 | 1939-02-14 | Hutchison Fine Grain Photo Dev | Photographic developer |
US2113312A (en) * | 1935-11-02 | 1938-04-05 | Eastman Kodak Co | Fine grain photographic developer |
US2110491A (en) * | 1936-04-16 | 1938-03-08 | Eastman Kodak Co | Photographic emulsions |
GB539509A (en) * | 1940-01-11 | 1941-09-15 | Eastman Kodak Co | Improvements in or relating to the production of colour photographs |
US2276322A (en) * | 1940-08-01 | 1942-03-17 | Eastman Kodak Co | Photographic emulsions |
-
1943
- 1943-04-23 GB GB16827/43A patent/GB565146A/en not_active Expired
- 1943-06-23 US US491914A patent/US2425363A/en not_active Expired - Lifetime
-
1946
- 1946-04-26 FR FR926080D patent/FR926080A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2425363A (en) | 1947-08-12 |
FR926080A (en) | 1947-09-22 |
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