Silver halide color photographic light-sensitive elements having improved image quality
US5736307A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1996 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Apr 8, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/158
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Silver halide photographic element comprising a support having coated thereon red-, green- and blue-sensitive silver halide emulsion layers comprising, respectively, cyan, magenta and yellow dye-forming couplers, wherein at least one silver halide emulsion layer comprises a yellow dye-forming DIR coupler having a 1,2,4-triazolyl group attached to the coupling position, said 1,2,4-triazolyl group comprising a hydrolyzable alkoxy- or aryloxy-carbonyl group attached to a benzylthio substituent on the 1,2,4-triazolyl group. Preferably, the yellow dye-forming DIR coupler is represented by the formula ##STR1## wherein R.sub.1 represents an alkyl group, an aryl group or --NHR.sub.5, wherein R.sub.5 represents an alkyl group or an aryl group, PA1 R.sub.2 represents an alkyl group or an aryl group, TIME represents a timing group, PA1 n is 0 or 1, PA1 R.sub.3 represents an alkyl group or a phenyl group, and PA1 R.sub.4 represents hydrogen atom or an alkyl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.