Light-sensitive silver halide color photographic elements containing 2-equivalent 5-pyrazolone magenta coupler and colored magenta coupler
US6261756A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2000 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | May 23, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/384
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention refers to a light-sensitive silver halide multilayer color photographic element having a support base and coated thereon blue-, green- and red-sensitive silver halide emulsion layers respectively associated with non-diffusing yellow, magenta and cyan dye-forming couplers, wherein at least one green-sensitive layer contains a 2-equivalent 3-anilino-4-phenylthio-5-pyrazolone magenta coupler and a 4-(4-hydroxy-phenylazo)-5-pyrazolone colored magenta coupler. The multilayer color photographic element of the present invention presents an improved speed and contrast, without a detrimental effect on the other sensitometric properties, such as Dmin and Dmax.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.