Process of preparing high bromide (100) tabular grain emulsions
US5879873A · kind A · utility
3Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1997 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Oct 23, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/44
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process of preparing a high bromide {100} tabular grain emulsion is disclosed wherein mean ECD of the tabular grains obtained at the conclusion of ripening is controlled by the use of chloride ion. Specifically, both the concentration of chloride ion introduced before grain nucleation and the proportion of chloride ion and bromide ion present during nucleation are shown to allow control of final mean grain ECD in the fully ripened emulsion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.