Preparation of photosensitive silver halide materials with a combination of organic ripening agents
US5246827A · kind A · utility
0Cited by
17References
19Claims
0Family size
Assignee
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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
A photosensitive silver halide emulsion is prepared by providing an emulsion containing an anionic acid-substituted and a neutral organic ripening agent and then growing silver halide grains in the emulsion. This combination of organic ripening agents of differing charge types produces a superadditive effect on the growth of silver halide crystals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.