Method of improving the light resistance of a dye image
US4540653A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1984 |
| Grant date | Sep 10, 1985 |
| Priority date | — |
| Expiry date | Aug 23, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/39284
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A photographic element comprising a support having thereon a layer containing a dye that is formed by the reaction of an anilino-type magenta coupler with the oxidized product of a color developing agent, the said layer comprising an organic solvent having a dielectric constant of not more than 6.5 and at least one of metallic complexes having the following Formula [I], Formula [II] or Formula [III]: ##STR1## In Formulas [I], [II] and [III], M is a nickel atom, copper atom, cobalt atom, palladium atom or platinum atom; X.sub.1 and X.sub.2 each is an oxygen atom, sulfur atom or --NR.sub.5 -- (wherein R.sub.5 is a hydrogen atom, an alkyl, aryl or hydroxyl radical); X.sub.3 is a hydroxyl or mercapto radical; Y is an oxygen atom or sulfur atom; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each is a hydrogen atom or a halogen atom or a cyano radical, or an alkyl, aryl, cycloalkyl or heterocyclic radical which each is bonded directly or through a divalent combining radical to a carbon atom; and at least one of the R.sub.1 -R.sub.2 and R.sub.3 -R.sub.4 combinations is allowed to form a 5- or 6-member cyclic ring together with the carbon atoms which are bonded with each other; and Z is a compound…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.