Method for increasing color-fastness of organic coloring matter

Details Method for increasing color-fastness of organic coloring matter Method for increasing color-fastness of organic coloring matter

1986-09-18

1988-05-03

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Imaged product

Nonsilver image

430512, 430551, 430931, 430216, 430220, 25240053, G03C 184, G03C 108

Patent

active

047419806

ABSTRACT:
A method for increasing color-fastness of organic coloring matters against light is disclosed. The color-fastness of the organic coloring matter of which absorption maximum is the region from 400 nm to 700 nm is increased by coexisting with a metal complex represented by the following general formula: ##STR1## in which R.sub.1 R.sub.2, R.sub.1 ' and R.sub.2 ' are a hydrogen atom or a substituent, X and X' are O or S, Y is O, S, SO or SO.sub.2 and M is a metal atom.
The method adapts to improve the fastness of color images of silver halide photographic materials. In this case, the organic coloring matter is a dyestuff formed by coupling a color forming coupler with an oxidation product of a color developing agent in the silver halide color photographic material or a dyestuff diffused to a receiving layer of the diffusion transfer silver halide color photographic material.

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