GB293347A - Process of treating and producing light-sensitive layers on photographic and heliographic papers - Google Patents
Process of treating and producing light-sensitive layers on photographic and heliographic papersInfo
- Publication number
- GB293347A GB293347A GB1453/28A GB145328A GB293347A GB 293347 A GB293347 A GB 293347A GB 1453/28 A GB1453/28 A GB 1453/28A GB 145328 A GB145328 A GB 145328A GB 293347 A GB293347 A GB 293347A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acids
- alkali
- acid
- diazo
- compounds
- 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
- G03C1/00—Photosensitive materials
- G03C1/52—Compositions containing diazo compounds as photosensitive substances
- G03C1/54—Diazonium salts or diazo anhydrides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
293,347. Schwickert Ges., R., and Burg, E. July 4, 1927, [Convention date]. Void [Published under Sect. 91 of the Acts]. Azo compounds; nitroso compounds.-The process of Specification 284,253, [Class 98 (ii), Photographic processes &c.], is modified by using as the light-sensitive media compounds produced by the action on diazo or nitroso bodies, such as diazotized 1-amino-2-naphthol-4-sulphonic acid, nitrosophenacetin, nitrosophenlactin, or aminophenol substituted by succinic acid, of alkali cr alkaline earth salts of aliphatic acids and oxyacids, aromatic carboxylic acids or sulpho acids, amido acids, &c., such as acetic, succinic, lactic, citric, tartaric, oxalic, benzoic, benzenesulphonic, cinnamic, and phenylacetic acids. The compounds are formed as precipitates by dissolving excess of the salt in a warm saturated aqueous solution of the diazo body or nitrosamine, and allowing to stand. Or concentrated solutions of the salt and of the diazo body or nitrosamine may be mixed together. Or, when a diazo compound is to be formed, it may be produced directly by diazotizing in a. solution of one of the aforementioned acids instead of in mineral acid, and neutralizing excess acid with alkali. To the lightsensitive layer may be added (1) hygroscopic substances such as alkali acetate or magnesium chloride, (2) acid salts such as alkali bisulphates, (3) substances such as organic acids to prevent coupling when coupling bodies are included in the layer, (4) oxidizing agents such as bichromates or alkali persulphates, perborates, and percarbonates, in order to deepen the colour of the pictures, and (5) catalysers to increase the effect of the oxidizing agents.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE293347X | 1927-07-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB293347A true GB293347A (en) | 1928-11-01 |
Family
ID=6078739
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1453/28A Expired GB293347A (en) | 1927-07-04 | 1928-01-16 | Process of treating and producing light-sensitive layers on photographic and heliographic papers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB293347A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2496240A (en) * | 1947-06-06 | 1950-01-31 | Gen Aniline & Film Corp | Diazotypes stabilized with sulfo amino benzoic acids |
-
1928
- 1928-01-16 GB GB1453/28A patent/GB293347A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2496240A (en) * | 1947-06-06 | 1950-01-31 | Gen Aniline & Film Corp | Diazotypes stabilized with sulfo amino benzoic acids |
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