Method for processing silver dye bleach materials
US4014698A · kind A · utility
8Cited by
2References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1975 |
| Grant date | Mar 29, 1977 |
| Priority date | — |
| Expiry date | Jun 30, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C5/44
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a new method for processing silver dye bleach material. The process measures of this method, consisting of (1) silver developing, (2) dye bleaching, (3) silver bleaching, (4) silver fixing are carried out in the sequence (1) to (4) with appropriate preparations. The silver bleaching (3) preparation contains (a) a strong acid, (b) a water-soluble iodide, (c) a water-soluble oxidizing agent, (d) a diazine compound and (e) an anti-oxidant. An excellent and rapid bleaching is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.