Concentrated photographic fixer additive and fixing compositions containing triazinylstilbene and method of photographic processing
US5955248A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1998 |
| Grant date | Sep 21, 1999 |
| Priority date | — |
| Expiry date | Jul 6, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/134
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Concentrated and working strength photographic fixing compositions include a photographic fixing agent, a triazinylstilbene compound, and a water-soluble stabilizing compound that has a molecular weight of less than 200, from 2 to 10 carbon atoms, and at least two amino or hydroxy functional groups. The triazinylstilbene is provided in a concentrated fixer additive composition in a mixture with the stabilizing compound. The fixing compositions also include predominantly ammonium ions, and can be used to provide images in color photographic materials, and particularly in color reversal films, with reduced residual sensitizing dye stain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.