Photographic element and process for providing metal complex color images
US4555478A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 1985 |
| Grant date | Nov 26, 1985 |
| Priority date | — |
| Expiry date | Jan 2, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/30547
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process of obtaining highly stable color images comprises use of an element which has a support having thereon at least one silver halide emulsion layer having associated therewith an essentially colorless, immobile, ligand-releasing compound of the structure LIG-X. In this structure, LIG is a ligand which is capable of complexing with metal ions (e.g. ferrous ions) to form a metal complex dye, and X is a group which, as a function of silver halide development, is cleaved from LIG. A color image is formed by developing the described element after imagewise exposure with a developing agent to imagewise cleave the bond between the LIG and X, and treating the developed element with metal ions (e.g. ferrous ions) to form a metal complex dye image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.