Iodide containing high bromide tabular grain emulsions exhibiting improved photoefficiency
US5728515A · kind A · utility
2Cited by
8References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1996 |
| Grant date | Mar 17, 1998 |
| Priority date | — |
| Expiry date | Apr 29, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/03
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographically useful high bromide tabular grain silver halide emulsion is disclosed in which iodide is incorporated in a tabular grain central region to lower contrast and in a peripheral region zone to increase photoefficiency. A further increase in photoefficiency is provided by an annular spacer region interposed between the central region and peripheral region zone having a lower iodide content than either.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.