Photographic developing process
US4141734A · kind A · utility
16Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1977 |
| Grant date | Feb 27, 1979 |
| Priority date | — |
| Expiry date | Dec 1, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C5/50
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for developing photographic silver halide material, which has been exposed image-wise is provided. The aqueous developer preparation used contains a developer compound for the silver halide, a water-soluble solvent for the silver halide and an aliphatic, cycloaliphatic, aromatic or heterocyclic di- or trisulphide. These preparations remain clear over a long period of time during which they do not lose their effectiveness by becoming turbid or by sedimentation of silver. They are of special advantage in continuously operated photographic developing processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.