| abstract |
(57) [Summary] [Object] To provide a dye suitable for heat-sensitive transfer and a heat-sensitive transfer sheet using the dye. [Structure] A thermal transfer sheet having an imidazole azo dye represented by the following general formula and a coloring material layer containing the dye: [In the formula, X represents a hydrogen atom, a methyl group or an acylamino group, Y represents a hydrogen atom or a lower alkoxy group. R 1 ~ R 3 represents a hydrogen atom, an optionally substituted alkyl group, a cycloalkyl group or an allyl group] |