| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermal recording material with outstanding texture shelf stability. SOLUTION: The thermal recording material has a thermal recording layer containing an electron-donative color developing compound and an electron- receptive compound, formed on a support and further, an undercoat layer formed between a support and the thermal recording layer. This material contains at least one kind of chemical compound selected from the group consisting of chemical compounds represented by formula (1) as the electron-receptive compound and the undercoat layer contains at least one kind of pigment with a pH value of 3 to 8 in a 5% water suspension. (In the formula, R1 to R5 are each a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group or an aryl group; R6 is a hydrogen atom or an alkyl group; R7 is a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group or a hydroxyl group. Further, mutually adjacent groups selected from R1 and R2 and R2 and R3 may bond each other and form a carbon cyclic aromatic ring with a substituted carbon atom). |
