Direct positive color light-sensitive material comprising a DIR coupler and a pyrazoloazole coupler, and a process for forming a direct positive image
US4801520A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1987 |
| Grant date | Jan 31, 1989 |
| Priority date | — |
| Expiry date | Jul 17, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/158
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A direct positive color light-sensitive material comprising a support having provided thereon at least one photographic emulsion layer containing unfogged internal latent image type silver halide particles and a color image forming coupler, wherein said color image forming coupler itself is substantially nondiffusible and produces or releases a dye upon oxidation coupling with a color developing agent, and said light-sensitive material contains at least one development inhibitor-releasing type coupler selected from the group consisting of compounds represented by formulae (D-I) and (D-II) EQU Coup--Z (D-I) EQU Coup--TIME--Z (D-II) wherein Coup represents a coupler residual group; Z represents a diffusible development inhibitor or a precursor thereof; and TIME represents a timing group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.