Modified peptizer twinned grain silver halide emulsions and processes for their preparation
US4942120A · kind A · utility
30Cited by
2References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Apr 28, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/43
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention is directed to a process of precipitating for use in photography a silver halide emulsion employing a gelatino-peptizer containing alkylated methionine and to an emulsion produced by this process. A variety of advantages can be realized, including an increase in the population of twinned grains and a higher yield of thin tabular grains.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.