METHOD FOR FORMING COLORING MATTER AND COLOR DEVELOPING COMPOSITION

摘要

PROBLEM TO BE SOLVED: To form a coloring matter having high usefulness for a color print material, etc., for outputting digital image information forming a color image at a low cost by simple operation according to a coupling without requiring an oxidizing agent such as a silver halide. SOLUTION: A precursor of an oxidized substance of a p-phenylenediamine derivative or a p-aminophenol derivative is reacted with an activator containing a metal atom reactive with the precursor of the oxidized substance and producing the oxidized substance of the p-phenylenediamine derivative or p- aminophenol derivative and a coloring matter-forming coupler capable of carrying out a coupling reaction with the oxidized substance of the p- phenylenediamine derivative or p-aminophenol derivative and forming the coloring matter to form the coloring matter.