Method for desalting silver halide emulsion and silver halide emulsion prepared thereby
US5523201A · kind A · utility
4Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1995 |
| Grant date | Jun 4, 1996 |
| Priority date | — |
| Expiry date | Mar 28, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/44
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A desalting method of a silver halide emulsion is disclosed, comprising removing soluble salts from the silver halide emulsion by electrodialysis, wherein said electrodialysis is carried out at a pH within a range of .+-.0.5 of an isoelectric point of a gelatin contained in the silver halide emulsion. Furthermore, by adding a salt during the course of the electrodialysis, the concentration of the emulsion is accomplished concurrently with desalting thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.