Color photographic silver halide material
US6077657A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1999 |
| Grant date | Jun 20, 2000 |
| Priority date | — |
| Expiry date | Jun 30, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3926
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A color photographic silver halide material having a support and at least one silver halide emulsion layer containing couplers, which layer contains as couplers a 2-equivalent magenta coupler and both at least one compound of the formula (III) and at least one compound of the formula (IV): ##STR1## in which R.sub.4 means H, alkoxy or alkylmercapto, PA1 R.sub.5 means alkyl, halogen or R.sub.4, PA1 R.sub.7 means OH, NHCHO, NHCONH-alkyl, CO-alkyl, COOH, COO-alkyl, CONH.sub.2, SO.sub.3 H, SO.sub.2 NH-alkyl, CH.sub.2 CH.sub.2 COOH and PA1 R.sub.7 means H, alkyl, halogen, OH or alkoxy is distinguished by improved pressure sensitivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.