| 摘要 |
PROBLEM TO BE SOLVED: To completely erase a printed colored image later by operating a color erasing agent at the colored image formed of a coloring compound containing an electron donative colorless dye represented by at least specific formula and an electron acceptive compound. SOLUTION: A coloring compound contains an electron donative colorless dye represented by at least formula I and an electron acceptive compound. In the formula I, -Z- is any of formulae II, a ring A is an aromatic ring which may have a substituent, R1, R2, R5 and R6 are each a hydrogen atom, an alkyl group or an aryl group, R3 and R4 are each a hydrogen atom, an alkyl group, aryl group, an alkoxy group, aryloxy group, a halogen atom, a cyano group, a sulfonyl group, an amino group or a nitro group, and these substituents may further contain other substituent. A colored image of the composition develops a good yellow color. When a color erasing agent is operated at the image, the colored image can be completely erased. |
