Method for regenerating oxidized photographic developers
US4145271A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1977 |
| Grant date | Mar 20, 1979 |
| Priority date | — |
| Expiry date | Oct 3, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C5/31
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for regenerating an oxidized photographic developer, which comprises bringing the oxidized photographic developer into contact with an adsorbent material which has affinity for the oxidation product of the developing agent or its derivatives and is substantially insoluble in the developer, and a method for regenerating an oxidized photographic developer, which comprises subjecting the oxidized developer to a contacting treatment with an adsorbent material which has affinity for the oxidation product of the developing agent or it derivatives and is substantially insoluble in the developer, and to an electrodialysis treatment using ion exchange membranes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.