PURPOSE: To improve stability of an org. coloring material to light by allowing specific compds. to co-exist with said coloring material.
CONSTITUTION: ≥1 Kinds of the compds. expressed by the formula are made to co-exist with the org. coloring material. In the formula, R1 denotes H, alkyl, etc.; R2 denotes a substituent; X denotes O, S; Y denotes a mere coupler, methylene, etc.,; n denotes 0W6. The above-mentioned coloring material includes image forming dyes used in a photographic field; for example, dyes formed of a color coupler, DRR compd., DDR coupler, amidrazone compd. dye developer, etc., dyes for a silver dye bleaching method, etc. The compds. expressed by the formula are generally soluble in oil and are added to hydrophilic colloid after the compds. are dissolved in a high boiling point solvent by making combination use of a low boiling point solvent at need. A coupler, hydroquinone deriv., UV absorbent, etc., may be added thereto at this time.
