Yellow dye-containing developing/fixing monobath and method for processing roomlight handleable black-and-white photographic elements
US6022675A · kind A · utility
2Cited by
7References
8Claims
0Family size
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Key dates
| Filing date | Apr 9, 1999 |
| Grant date | Feb 8, 2000 |
| Priority date | — |
| Expiry date | Apr 9, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/52
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Black-and-white elements, such as radiographic films, can be processed in roomlight using a developing/fixing monobath composition that also includes a water-soluble colorant, such as a water-soluble "yellow" dye, that provides safelight conditions in the processing composition. The processing method is carried out quickly, that is within 120 seconds. The colorant has a maximum absorption wavelength of from about 350 to about 500 nm, and is transparent in solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.