GB1086889A - Colour bleaching catalysts for the silver dyestuff bleaching process - Google Patents
Colour bleaching catalysts for the silver dyestuff bleaching processInfo
- Publication number
- GB1086889A GB1086889A GB49275/65A GB4927565A GB1086889A GB 1086889 A GB1086889 A GB 1086889A GB 49275/65 A GB49275/65 A GB 49275/65A GB 4927565 A GB4927565 A GB 4927565A GB 1086889 A GB1086889 A GB 1086889A
- Authority
- GB
- United Kingdom
- Prior art keywords
- benzoquinoxaline
- dimethyl
- bleaching
- catalysts
- colour
- 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
- G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
- G03C7/28—Silver dye bleach processes; Materials therefor; Preparing or processing such materials
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Detergent Compositions (AREA)
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention comprises compounds free from COOH and SO3H groups of formula <FORM:1086889/C2/1> wherein at least one of the substituent pairs R1, R2 and R3, R4 is a carbocyclic aromatic group substituted by a sulphonamide group via the S atom and fixed to the pyrazine ring and in which the substituent in as far as it does not form a ring of this type is an alkyl, aryl, cycloalkyl or heterocyclic group. The compounds are used as catalysts in photographic compositions (see Division G2). In an example 2,3-dimethyl -8 - N - methylsulphamyl - benzoquinoxaline is prepared by reducing the o-aminoazo dye aniline -->2-aminonaphthalene-6-sulphomethylamide with sodium dithionite to yield 1,2-diaminonaphthalene-6-sulphomethylamide which is condensed with diacetyl; 2,3-dimethyl -8 - N,N - dimethylsulphamyl - benzoquinoxaline and 2,3-dimethyl-8-N-b -diethylaminoethyl -sulphamyl - benzoquinoxaline are also specified.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1497464A CH440968A (en) | 1964-11-20 | 1964-11-20 | Use of organic compounds as color bleaching catalysts for the silver color bleaching process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1086889A true GB1086889A (en) | 1967-10-11 |
Family
ID=4405312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB49275/65A Expired GB1086889A (en) | 1964-11-20 | 1965-11-19 | Colour bleaching catalysts for the silver dyestuff bleaching process |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3443947A (en) |
| AT (1) | AT261401B (en) |
| BE (1) | BE672430A (en) |
| CH (1) | CH440968A (en) |
| ES (1) | ES319790A1 (en) |
| FR (1) | FR1453726A (en) |
| GB (1) | GB1086889A (en) |
| NL (1) | NL6515065A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH508226A (en) * | 1969-03-13 | 1971-05-31 | Ciba Geigy Ag | Use of quinoxalines as color bleaching catalysts |
| CH553428A (en) * | 1970-09-04 | 1974-08-30 | Ciba Geigy Ag | USE OF QUINOXALINES AS A HYDROGEN TRANSFER. |
| CH644459A5 (en) * | 1978-09-29 | 1984-07-31 | Ciba Geigy Ag | METHOD FOR PRODUCING COLOR PHOTOGRAPHIC IMAGES AFTER THE SILVER COLORING METHOD. |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE637277A (en) * | 1962-09-14 |
-
1964
- 1964-11-20 CH CH1497464A patent/CH440968A/en unknown
-
1965
- 1965-11-15 FR FR38438A patent/FR1453726A/en not_active Expired
- 1965-11-16 US US508156A patent/US3443947A/en not_active Expired - Lifetime
- 1965-11-17 BE BE672430A patent/BE672430A/xx unknown
- 1965-11-19 AT AT1041665A patent/AT261401B/en active
- 1965-11-19 ES ES0319790A patent/ES319790A1/en not_active Expired
- 1965-11-19 GB GB49275/65A patent/GB1086889A/en not_active Expired
- 1965-11-19 NL NL6515065A patent/NL6515065A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE672430A (en) | 1966-05-17 |
| ES319790A1 (en) | 1966-05-01 |
| NL6515065A (en) | 1966-05-23 |
| US3443947A (en) | 1969-05-13 |
| AT261401B (en) | 1968-04-25 |
| FR1453726A (en) | 1966-06-03 |
| CH440968A (en) | 1967-07-31 |
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