Preparation method for (100) tabular silver halide grains rich in chloride in silica sol as binder
US5840474A · kind A · utility
3Cited by
5References
4Claims
0Family size
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Key dates
| Filing date | Sep 18, 1996 |
| Grant date | Nov 24, 1998 |
| Priority date | — |
| Expiry date | Sep 18, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/01
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method is disclosed for the preparation of tabular silver halide emulsion grains rich in chloride and showing (100) parallel major and an average aspect ratio of at least 2.0 in silica sol as protective colloid binder. Important parameters are the addition modalities of the silica sol and the ratio of its amount to the amount of a costabilizing onium compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.