Photographic colour material containing a resorcinol derivative as black coupler
US7323294B2 · kind B2 · utility
0Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2005 |
| Grant date | Jan 29, 2008 |
| Priority date | — |
| Expiry date | Nov 17, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/346
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A color photographic material is disclosed comprising a black image forming coupler substituted in the 2, 4 and/or 6 position shown by formula (I) or formula (II), where in LINK represents a divalent linking group, BALL represents a group that prevents the coupler from diffusing away from the layer containing it. X and Y each represent a hydrogen atom or a coupling-off group capable of being released upon an oxidative coupling reaction with a developing agent. The material has a good color reproduction and excellent light stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.