Photographic fixing composition containing an oxadiazolethione and method of rapid photographic processing
US6007972A · kind A · utility
1Cited by
11References
25Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 16, 1999 |
| Grant date | Dec 28, 1999 |
| Priority date | — |
| Expiry date | Feb 16, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/421
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Color photographic silver halide elements, such as color films, can be rapidly fixed using a fixing composition containing a thiosulfate fixing agent, and certain sulfur-substituted oxadiazoles (that is oxadiazolethiones). Each of the components is present in specific amounts to effect rapid and efficient desilvering. The composition also includes predominantly ammonium cations (at least 50 mol %). Besides effective and rapid silver removal (less than 60 seconds), the fixing composition also minimizes residual dye stain from sensitizing dye aggregates within the photographic elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.