Photographic fixing composition and method of rapid photographic processing
US6001545A · kind A · utility
3Cited by
11References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1998 |
| Grant date | Dec 14, 1999 |
| Priority date | — |
| Expiry date | Dec 30, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/40
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Color photographic silver halide elements, such as color films, can be rapidly fixed using a fixing composition containing a mixture of thiosulfate and thiocyanate fixing agents, and certain sulfur-containing 1,2,4-triazoles. 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 (up to 50 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.