Color photographic materials including magenta coupler, carbonamide compound and aniline or amine compound, and methods
US5200309A · kind A · utility
12Cited by
13References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1991 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | Aug 29, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3012
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Color photographic materials comprise a support bearing a silver halide emulsion and a coupler composition. The coupler composition comprises a two-equivalent pyrazolone magenta dye-forming coupler, a ballasted carbonamide compound, and a ballasted aniline or amine compound. The carbonamide compound and the aniline or amine compound reduce continued coupling of the pyrazolone magenta dye-forming coupler during the bleach step in a color photographic process without altering the advantageous color image properties provided by the two-equivalent pyrazolone magenta dye-forming coupler
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.