Method of use of stabilized rapid access color developers for color negative film
US6664035B1 · kind B1 · utility
0Cited by
9References
18Claims
0Family size
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Key dates
| Filing date | Nov 3, 2000 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Nov 3, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/44
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for providing a color image in an exposed color negative silver bromoiodide film element comprising contacting said element with an aqueous color developing composition having a pH of 9.0 to 12.0 and comprising a color developing agent, sulfite ion and an additional antioxidant wherein the color developing agent/sulfite ion molar ratio is less than 10:1 and greater than 0.55:1, and the sulfite ion/antioxidant molar ratio is less than 4.35:1 and greater than 0.25:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.