High chloride [100] tabular grain emulsions improved emulsions and improved precipitation processes
US5413904A · kind A · utility
25Cited by
4References
3Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 3, 1994 |
| Grant date | May 9, 1995 |
| Priority date | — |
| Expiry date | Jun 3, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/01
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An improved preparation of high chloride {100} tabular grain emulsions that relies on iodide ions to produce tabular grain growth is disclosed. By delaying iodide ion introduction until after the initiation of grain nucleation the proportion of total grain projected area accounted for by high chloride {100} tabular grains is increased. The projected areas of the {100} tabular grains can exceed 95 percent of total grain projected area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.