GB605941A - Improvements relating to photographic emulsions - Google Patents
Improvements relating to photographic emulsionsInfo
- Publication number
- GB605941A GB605941A GB512745A GB512745A GB605941A GB 605941 A GB605941 A GB 605941A GB 512745 A GB512745 A GB 512745A GB 512745 A GB512745 A GB 512745A GB 605941 A GB605941 A GB 605941A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prepared
- phenetidine
- thioacetyl
- naphthylamine
- toluidine
- 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
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
- G03C1/08—Sensitivity-increasing substances
- G03C1/28—Sensitivity-increasing substances together with supersensitising substances
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
2 : 4 - Dimethylbenzthiazole is prepared by oxidizing thioacetyl-o-toluidine with alkaline potassium ferricyanide. 2-Methyl-4-ethoxybenzthiazole and 2-ethyl-b -naphthathiazole are prepared similarly from thioacetyl-o-phenetidine and thiopropionyl - a - naphthylamine respectively. Thioacetyl-o-toluidine is prepared by heating acetyl-o-toluidine with P2S5 in dry benzene. Thioacetyl-o-phenetidine and thiopropionyl-a -naphthylamine are similarly prepared. Acetyl-o-phenetidine is prepared by acetylating o-phenetidine with acetic anhydride. Propionyl-a -naphthylamine is prepared by refluxing together a -naphthylamine and propionic acid.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB512745A GB605941A (en) | 1945-03-01 | 1945-03-01 | Improvements relating to photographic emulsions |
| FR944061D FR944061A (en) | 1945-03-01 | 1946-08-22 | Improvements to photographic emulsions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB512745A GB605941A (en) | 1945-03-01 | 1945-03-01 | Improvements relating to photographic emulsions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB605941A true GB605941A (en) | 1948-08-04 |
Family
ID=9790216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB512745A Expired GB605941A (en) | 1945-03-01 | 1945-03-01 | Improvements relating to photographic emulsions |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR944061A (en) |
| GB (1) | GB605941A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6341853A (en) * | 1986-08-07 | 1988-02-23 | Fuji Photo Film Co Ltd | Silver halide color photographic sensitive material |
-
1945
- 1945-03-01 GB GB512745A patent/GB605941A/en not_active Expired
-
1946
- 1946-08-22 FR FR944061D patent/FR944061A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR944061A (en) | 1949-03-25 |
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