G - Physics – 03 – C
Patent
G - Physics
03
C
8/45, 96/71
G03C 1/815 (2006.01) C07F 1/00 (2006.01) C07F 15/00 (2006.01) C07F 15/04 (2006.01) G03C 7/26 (2006.01) G03C 7/392 (2006.01) G03C 8/00 (2006.01) G03C 8/24 (2006.01)
Patent
CA 1277807
ABSTRACT OF THE DISCLOSURE A method for increasing color-fastness of organic coloring matters against light is disclosed. the color- fastness of the organic coloring matter of which absoption maximum is the region from 400nm to 700nm is increased by coexisting with a metal complex represented by the following general formula: Image in which R,, R2, Rl' and R2' are a hydrogen atom or a substituent, X and X' are O or S, Y is O, S, SO or SO2 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 recieving layer of the diffusion transfer silver halide color photographic material.
518517
Konishiroku Photo Industry Co. Ltd.
Swabey Ogilvy Renault
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