Gelatin-grafted-polymer particles as peptizer for silver halide emulsions
US5503972A · kind A · utility
1Cited by
19References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1995 |
| Grant date | Apr 2, 1996 |
| Priority date | — |
| Expiry date | Apr 13, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/388
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention describes the use of gelatin-grafted-polymer particles as peptizers for the preparation of silver halide photographic emulsions, whereby the gelatin-grafted-polymer particles remain attached to the AgX crystals after preparation of the emulsions. In an embodiment of this invention, the core polymer particles are loaded with photographically useful agents. When the photographic agent is a dye-forming coupler, multicolor mixed-packet systems can be constructed using the packet emulsions prepared in the manner of this invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.