Performance of high speed emulsions for color film
US6245497A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1999 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Dec 20, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/156
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic element comprises a support bearing a cyan dye image-forming unit comprising at least one red-sensitive silver halide emulsion layer having associated therewith at least one cyan dye-forming coupler, a magenta dye image-forming unit comprising at least one green-sensitive silver halide emulsion layer having associated therewith at least one magenta dye-forming coupler, a yellow dye image-forming unit comprising at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler, wherein at least one of said emulsion layers comprises PA1 a) an emulsion with 3D, core/shell grains of at least 0.40 .mu.m average diameter having a high iodide content in the core of the grain with a shell containing a lesser amount of iodide, PA1 b) a one-equivalent image-dye forming coupler, and PA1 c) a fragmentable electron donating compound of the formula: X--Y' or a compound which contains a moiety of the formula --X--Y'; wherein PA1 X is an electron donor moiety, Y' is a leaving proton H or a leaving group Y, with the proviso that if Y' is a proton, a base, .beta..sup.-, is covalently linked directly or indirectly to X, and whe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.