Photographic element containing an azopyrazolone masking coupler exhibiting reduced fog
US5466568A · kind A · utility
2Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1993 |
| Grant date | Nov 14, 1995 |
| Priority date | — |
| Expiry date | Sep 30, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/333
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic element and imaging process used therewith provides reduced fogging where the element comprises a light sensitive silver halide layer containing (1) an azopyrazolone masking coupler and (2) a ballasted aromatic nitro compound having a reduction peak potential which is more positive than -1.3 V vs. the Standard Calomel Electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.