Method for obtaining monodisperse tabular grains
US5484697A · kind A · utility
7Cited by
10References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1993 |
| Grant date | Jan 16, 1996 |
| Priority date | — |
| Expiry date | Nov 12, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/43
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a method for preparing a photographic tabular silver halide grains emulsion. The method is characterized in that the twinned silver halide seeds are precipitated, either in an external static nucleator working in laminar flow regime with a Reynolds number less than 2100, or in a kettle with a very low stirring rate with respect to the one generally used, and in that the concentration of the Ag.sup.+ ion solution is ranging from 0.04 to 0.3M. Obtained are tabular silver halide grains, the diameter distribution of which is less than 15%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.