Processing of monochrome photographic silver halide print material
US5770351A · kind A · utility
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4References
15Claims
0Family size
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Key dates
| Filing date | Aug 15, 1997 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | Aug 15, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C5/30
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is described a method of processing silver halide photographic material in a processing machine using a developing solution which comprises either a hydroquinone type developing agent or a reductone type developing agent, together with an electron transfer agent as an auxiliary developing agent, and with at least one basic compound the anion of which is carbonate, sulphite or hydroxide, where in the presence of a compound of formula (I), Ar is an aromatic ring or heterocyclic aromatic ring which is optionally substituted. ##STR1##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.