Performance of photographic emulsions at high silver ion concentrations
US5989795A · kind A · utility
1Cited by
5References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 1992 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | May 21, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention relates to a photographic recording material comprising a support and a photosensitive chemically sensitized silver halide emulsion layer, containing a sensitizing dye selected from the group consisting of oxonal dyes, merocyanine dyes, and cyanine dyes having a net negative charge, and which has a pH value between about 2 to about 5 and a pAg value between about 1 to about 4.7.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.