Color photographic recording material containing color couplers which yield heat-stable dyes
US5200305A · kind A · utility
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2Claims
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Key dates
| Filing date | Sep 27, 1990 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | Sep 27, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3225
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A color photographic material containing color couplers which yield heat-stable dyes. A color photographic recording material containing cyan couplers which, during chromogenic development, yield cyan dyes having parameters a and b such that EQU a.(1+b).ltoreq.1.5 are suitable for the production of color negatives for multicopy operation in which a plurality of identical copies are successively prepared from the same original. In the above condition: PA0 a is the temperature coefficient of the absorption ##EQU1## and b is the temperature coefficient of the absorption wavelength .lambda..sub.(T=23.degree. C.) ##EQU2##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.