Photographic silver halide material having improved spectral characteristics
US5736306A · kind A · utility
0Cited by
9References
16Claims
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Key dates
| Filing date | Dec 21, 1995 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Dec 21, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/384
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Spectral properties of dye images produced from low silver halide coverage materials are improved by using dyes which are formed in the magenta, yellow and cyan image dye-forming units. These dyes have certain spectral characteristics, as determined by their unwanted absorptions, in combination with certain silver halide emulsion grain characteristics in each emulsion layer. In particular, reduction of unwanted absorptions can be achieved either with couplers per se which meet these characteristics or by the use of certain high-boiling solvents in the coupler dispersions at preferred levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.