Process for the preparation of silver halide emulsions having iodide containing grains
US5792602A · kind A · utility
4Cited by
8References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1997 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | Mar 17, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/44
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process is disclosed of preparing a photographically useful emulsion containing radiation-sensitive silver iodohalide grains. Silver halide grains having a face centered cubic rock salt crystal lattice structure are precipitated within an aqueous dispersing medium including a hydrophilic colloid peptizer. Iodide ion is introduced into the crystal lattice structure by introducing elemental iodine into the dispersing medium and maintaining the dispersing medium within a pH range of from 5 to 8.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.