Silver halide emulsions, elements and methods of making same using synthetic biopolymer peptizers
US5580712A · kind A · utility
7Cited by
10References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1995 |
| Grant date | Dec 3, 1996 |
| Priority date | — |
| Expiry date | Feb 3, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2001/03594
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Certain synthetically prepared biopolymers are useful as peptizers in the preparation of photographic silver halide emulsions and elements. Such materials can be used as either nucleation or growth peptizers in place of common peptizing colloids, such as gelatins. The biopolymers can be prepared using recombinant or chemical synthetic methods and designed to have a particular affinity (either high or low) for silver ions. Thus, they can be used to control silver halide grain morphology in the emulsions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.