Alkaline black-and-white developer for silver halide photographic material
US5478706A · kind A · utility
0Cited by
9References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1994 |
| Grant date | Dec 26, 1995 |
| Priority date | — |
| Expiry date | Mar 3, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C5/46
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to an alkaline aqueous black-and-white photographic developer composition comprising: PA1 (1) at least one black-and-white developing agent, PA1 (2) at least one black-and-white auxiliary developing agent, PA1 (3) at least one antifoggant, PA1 (4) at least one sequestering agent, PA1 (5) a sulfite antioxidant, PA1 (6) at least one buffering agent, PA1 (7) a tone agent, and PA1 (8) at least one tone promoting agent, wherein said tone agent is a primary organic amine compound and said tone promoting agent is a silver halide solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.