Color diffusion transfer photographic material
US5447834A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1994 |
| Grant date | Sep 5, 1995 |
| Priority date | — |
| Expiry date | Apr 4, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C8/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A color photographic material for diffusion transfer which comprises a support having thereon at least one light-sensitive silver halide emulsion layer containing a combination of a reducible dye providing compound represented by the following general formula (I) and an electron donor, said reducible dye providing compound releasing a diffusing dye when reduced, wherein at least one layer of silver halide emulsion layers contains a silver halide emulsion obtained by treating a silver halide emulsion, previously chemical sensitized in the presence of a sensitizing dye, with a solid adsorbent to desorb a part or the whole of the adsorbed dye. EQU PWR-(Time).sub.t -Dye (I) wherein PWR represents a group which releases -(Time).sub.t -Dye when reduced; Time represents a group which releases Dye through subsequent reactions after -(Time).sub.t -Dye is released from PWR; t represents an integer of 0 or 1; and Dye represents a dye or a precursor thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.