| 摘要 |
PROBLEM TO BE SOLVED: To enhance the yellow density, the preservability of coloring matter and the lightfastness by adding a quinophthalon based coloring matter and a pyrazolone methine based coloring matter to a coloring material layer. SOLUTION: A coloring material layer contains at least a quinophthalon based coloring matter and a pyrazolone methine based coloring matter. Preferably, a quinophthalon based coloring matter shown by formula I is combined with a pyrazolone methine based coloring matter shown by formula II. In formula I, R1 represents a hydrogen atom or an alkyl group of 1C-4C, R2 represents a hydrogen atom, A represents -CONR4 R5 , R3 represents an alkyl group of 3C-8C or an alcoxy ethyl group of 3C-8C, R4 and R5 represent an alkyl group of 2C-8C independently, R6 and R7 represent a methyl group, an ethyl group, a propyl group, a buthyi group, a phenyl group or a tluic group, R8 and R9 represent a methyl group or a -COOY group, and Y represents an ethyl group, a propyl group or a buthyl group. |
