| 摘要 |
PURPOSE:To obtain the stability which is superior to the radiation of a light by containing a phthalide derivative which is expressed by another general formula in a recording body containing a phthalide derivative which is expressed by a specified formula, as a colorless or lightly colored basic dye. CONSTITUTION:A phthalide derivative which is expressed by the formula I or II, and a phthalide derivative which is expressed by the formula III (R22 shows hydrogen atom; halogen atom; hydroxide group; C1-C8 alkyl group; C3-C8 cycloalkyl group; C1-C8 alkoxyl group; amino group-NR40R41, R27, R35 respectively become NR42R43, NR44R45 only at the time of an amino group of R22, R38, 39, 40-47 show hydrogen atom C1-C8 alkyl group; C3-C8 cycloalkyl group; aryl group which may be substituted, etc.), or the formula IV (R48,49 show hydrogen atom; C1-C8 alkyl group; C3-C8 cycloalkyl group; aryl group which may be substituted, R50-53 show a hydrogen atom; halogen atom; hydroxide group; C1-C8 alkyl group; C3-C8 cycloalkyl group; C1-C8 alkoxyl group, A shows the formula V.) are jointly applied. |
