Preparation of photosensitive silver halide materials with organic ripening agents
US5246825A · kind A · utility
1Cited by
17References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 8, 1992 |
| Grant date | Sep 21, 1993 |
| Priority date | — |
| Expiry date | May 8, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/07
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Photosensitive silver halide emulsions are prepared by providing an emulsion containing an anionic acid-substituted organic ripening agent and a salt of an element in Group IIA of the Periodic Table and then growing silver halide grains in the emulsion. This combination of an acid-substituted organic ripener and a salt of a Group IIA element produces a superadditive effect on the growth of silver halide crystals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.