Process for production of masked positive color images by the silver dye bleach process and the silver dye bleach material used in this process
US4368256A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1981 |
| Grant date | Jan 11, 1983 |
| Priority date | — |
| Expiry date | Jul 13, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Production of masked positive color images by the silver dye bleach process, by exposure of a photographic material for the silver dye bleach process, silver developing, dye bleaching, silver bleaching and fixing, optionally the silver bleaching is carried out simultaneously with the dye bleaching and/or the fixing, in a single processing bath. The photographic material used contains PA0 (a) in at least one layer, at least one first dye from which at least one undesired secondary color density is to be compensated, PA0 (b) in the layer(s) (a) and/or in a layer adjacent to this layer, (in each case) one iodide-containing silver halide emulsion associated with this dye (these dyes), PA0 (c) in at least one other layer, at least (in each case) one second dye, the main color density of which corresponds to the secondary color density (densities), to be compensated, of the first dye(s), PA0 (d) in the layer(s) (c) and/or in a layer adjacent thereto, an iodide-free silver halide emulsion associated with this dye (these dyes), or, in comparison with the emulsions mentioned under (b), a silver halide emulsion of low iodide content, and PA0 (e) in the layer(s) (c) and/or in at least one oth…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.