Concentrated color developer composition used for silver halide photographic sensitized material and processing method by use thereof
US6900004B2 · kind B2 · utility
100Cited by
1References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 26, 2003 |
| Grant date | May 31, 2005 |
| Priority date | — |
| Expiry date | Oct 12, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/421
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A one-part photographic developing concentrate comprising: (i) a paraphenylene diamine color developing agent; and (ii) a water-soluble organic solvent, wherein a molar ratio of sodium ion to potassium ion is at least 3, and a molar ratio of sulfate ion to carbonate ion is at least 0.25.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.