Process for forming direct positive color image
US4933265A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1989 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Feb 23, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/413
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for forming a direct positive color image is disclosed, the process comprising imagewise exposing a photosensitive material containing at least one emulsion layer of silver halide of internal latent image type, which has not been preliminarily fogged, and a color image-forming coupler; developing said material using a surface developing solution containing an aromatic primary amine color developing agent in the presence of a nucleating agent and/or in the condition that fogging exposure is carried out prior to the developing step or during the developing step; bleaching; and fixing, wherein said color coupler is a compound which is in itself substantially nondiffusible, and capable of forming or releasing a substantially nondiffusible dye upon oxidative coupling with said aromatic primary amine color developing agent and said development processing is carried out at a pH of 11.5 or less using a developing solution containing substantially no benzyl alcohol in the presence of at least one compound selected from the group consisting of the compounds represented by the general formula (I) EQU A[(Y.sup.1).sub.n R].sub.m
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.