Method for preparing photographic emulsion
US5141846A · kind A · utility
3Cited by
10References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1990 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Oct 18, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/03
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for manufacturing a photosensitive silver halide emulsion which comprises the steps, in sequence, of forming silver bromide grains which have predominantly (111) crystal faces or mixed halide grains of any morphology in the presence of a hydrophilic colloid; contacting said grains with a silver halide complexing agent which also forms insoluble silver salts; spectrally sensitizing said grains with an aggregating spectral sensitizing dye prior to or simultaneously with chemical sensitization of said grains wherein said spectral sensitization takes place the presence of said silver halide complexing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.