QUINOPHTHALONE COLORING MATTER FOR THERMAL TRANSFER AND THERMAL TRANSFER SHEET USING THIS COLORING MATTER AND THERMAL TRANSFER INK

摘要

PROBLEM TO BE SOLVED: To provide a quinophthalone coloring matter which is best suited for a thermal transfer sheet, with high solubility in an organic solvent and achievable high recording density. SOLUTION: The quinophthalone coloring matter for thermal transfer is represented by formula (1), (wherein, R1 is a hydrogen atom or a substitutable alkyl group; R2 is the hydrogen atom or a halogen atom; R3 is the substitutable alkyl group or a substitutable unsaturated alkyl group; and R4 is a substitutable aryl group).