GB299751A - Improvements in and relating to photographic developers - Google Patents
Improvements in and relating to photographic developersInfo
- Publication number
- GB299751A GB299751A GB1725427A GB1725427A GB299751A GB 299751 A GB299751 A GB 299751A GB 1725427 A GB1725427 A GB 1725427A GB 1725427 A GB1725427 A GB 1725427A GB 299751 A GB299751 A GB 299751A
- Authority
- GB
- United Kingdom
- Prior art keywords
- developing
- relating
- groups
- sulphonic acid
- hydroquinone
- 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
- G03C5/29—Development processes or agents therefor
- G03C5/305—Additives other than developers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
299,751. Merejkovsky, B. June 29, 1927. Developing.-To a developing composition containing (1) a polyphenol having two or more OH groups and not being an amine (such as hydroquinone or pyrogallol), and (2) hydroxylamine sulphonic acid or nitrilo sulphonic acid or salts thereof, there is added a very small quantity of a primary diamine or a secondary amine, as an accelerator, i.e., organic products containing the groups NH or (NH2)2, such as for example piperidine, methylaniline, methylpara-amido-phenol, amidol or the like. Two specific hydroquinone developing compositions are given. Reference is made to Specification 255,925.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1725427A GB299751A (en) | 1927-06-29 | 1927-06-29 | Improvements in and relating to photographic developers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1725427A GB299751A (en) | 1927-06-29 | 1927-06-29 | Improvements in and relating to photographic developers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB299751A true GB299751A (en) | 1928-10-29 |
Family
ID=10091955
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1725427A Expired GB299751A (en) | 1927-06-29 | 1927-06-29 | Improvements in and relating to photographic developers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB299751A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2782121A (en) * | 1954-02-15 | 1957-02-19 | Goldhammer Jerome Stewart | Combined developer and fixer |
US2782120A (en) * | 1954-02-15 | 1957-02-19 | Goldhammer Jerome Stewart | Combined developer and fixer |
US2901350A (en) * | 1954-10-12 | 1959-08-25 | Goldhammer Jerome Stewart | Combined developers and fixers |
-
1927
- 1927-06-29 GB GB1725427A patent/GB299751A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2782121A (en) * | 1954-02-15 | 1957-02-19 | Goldhammer Jerome Stewart | Combined developer and fixer |
US2782120A (en) * | 1954-02-15 | 1957-02-19 | Goldhammer Jerome Stewart | Combined developer and fixer |
US2901350A (en) * | 1954-10-12 | 1959-08-25 | Goldhammer Jerome Stewart | Combined developers and fixers |
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