Method for processing color photographic films using a peroxide bleaching composition
US5773202A · kind A · utility
4Cited by
10References
19Claims
0Family size
Inventors
Key dates
| Filing date | Mar 29, 1996 |
| Grant date | Jun 30, 1998 |
| Priority date | — |
| Expiry date | Mar 29, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/144
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A simple and effective bleaching method includes the use of a bleaching solution including a peroxide bleaching agent and chloride ion in an amount of at least 0.35 mol/l. An organic phosphonic acid or tertiary aminocarboxylic acid can also be present for stability. The method is useful for bleaching color photographic films containing at least 20 mol % silver bromide and from 0 to about 0.5 mol % silver iodide in at least one silver halide emulsion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.