GB1042300A - Photographic layers for the silver dyestuff bleaching process - Google Patents
Photographic layers for the silver dyestuff bleaching processInfo
- Publication number
- GB1042300A GB1042300A GB585465A GB585465A GB1042300A GB 1042300 A GB1042300 A GB 1042300A GB 585465 A GB585465 A GB 585465A GB 585465 A GB585465 A GB 585465A GB 1042300 A GB1042300 A GB 1042300A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydroxynaphthalene
- azo
- formula
- bleaching process
- acid residues
- 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
- G03C7/29—Azo dyes therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Abstract
Azo dyes of the general formula <FORM:1042300/C4-C5/1> where R1 is a phenylene group attached to the azo in 1-position and to the azoxy in 4-position and contains an alkoxy or hydroxyalkoxy group of not more than 5 carbon atoms in 2-position, which phenylene group may be further substituted, and R2 and R12 are each 8-hydroxynaphthalene disulphonic acid residues bound in 7- position and carrying a substituted amino group in 1-position, are made by reducing a nitro-azo dye of the formula R2-N=N-R1-NO2 with, for example, glucose in alkaline medium to obtain dyes where R2=R12, or by coupling tetrazo compounds of diamines of the formula <FORM:1042300/C4-C5/2> appropriate amino-hydroxynaphthalene disulphonic acids. The substituted amino groups in the hydroxynaphthalene disulphonic acid residues may be phenylamino, cyclohexylamino or p-toluenesulphonyl amino groups.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH240464A CH431272A (en) | 1960-03-09 | 1964-02-27 | Photographic layer for the silver dye bleaching process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1042300A true GB1042300A (en) | 1966-09-14 |
Family
ID=4232989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB585465A Expired GB1042300A (en) | 1964-02-27 | 1965-02-10 | Photographic layers for the silver dyestuff bleaching process |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE660288A (en) |
| FR (1) | FR87423E (en) |
| GB (1) | GB1042300A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4235957A (en) * | 1979-01-25 | 1980-11-25 | Eastman Kodak Company | Thermal silver-dye bleach element and process |
-
1965
- 1965-02-09 FR FR4899A patent/FR87423E/en not_active Expired
- 1965-02-10 GB GB585465A patent/GB1042300A/en not_active Expired
- 1965-02-26 BE BE660288D patent/BE660288A/xx unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4235957A (en) * | 1979-01-25 | 1980-11-25 | Eastman Kodak Company | Thermal silver-dye bleach element and process |
Also Published As
| Publication number | Publication date |
|---|---|
| BE660288A (en) | 1965-08-26 |
| FR87423E (en) | 1966-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1042300A (en) | Photographic layers for the silver dyestuff bleaching process | |
| ES408644A1 (en) | Watersoluble trisazo dyestuffs | |
| GB1003786A (en) | Phthalocyanine dyestuffs and process for their manufacture | |
| GB1002345A (en) | Photographic layers for the silver dyestuff bleaching method | |
| GB969146A (en) | Photographic material for the silver dye bleaching process | |
| GB1019467A (en) | New tetrakisazo dyestuffs and process for their production | |
| GB769163A (en) | New hydrazone dyestuffs and process for making them | |
| GB922568A (en) | Photographic layers suitable for the silver dyestuff bleaching method | |
| GB1062255A (en) | New disazo dyestuffs insoluble in water and their application to the colouration of hydrophobic fibres | |
| GB955892A (en) | Photographic layers suitable for the silver dyestuff bleaching process | |
| ES254256A1 (en) | Monoazophthalocyanine dyes | |
| GB980399A (en) | Photographic materials for the silver dyestuff bleaching process | |
| ES391781A1 (en) | Dyeing polyamide fibers with chromium-donating monoazo dyestuffs | |
| GB1106048A (en) | Disazo dyes containing a heterocyclic residue and free from sulphonic acid groups | |
| GB952068A (en) | Improvements in or relating to pyrimidine dyestuffs | |
| ES254935A1 (en) | Phthalocyanine dyestuffs and process for their manufacture | |
| ES409123A1 (en) | Trisazo dyestuffs | |
| ES401400A1 (en) | Alkali-fast disazo disulfimide dyes | |
| GB1045705A (en) | Photographic material for the silver dyestuff bleaching process | |
| GB445266A (en) | Process for the improvement of dyeings on cellulosic fibres with substantive dyestuffs | |
| GB838345A (en) | New monoazo dyestuffs derived from cyanuric bromide | |
| GB865748A (en) | Metallisable tetrakisazo dyestuffs | |
| ES397592A1 (en) | Azo water-insoluble dyestuffs for hydrophobic fibres | |
| GB733361A (en) | Manufacture of new trisazo-dyestuffs | |
| GB939906A (en) | Photographic layers suitable for the silver dyestuff bleaching process |