| 摘要 |
PROBLEM TO BE SOLVED: To develop a heat-sensitive recording material having a high skin whiteness with high sensitivity and small fogging due to a heat. SOLUTION: The heat-sensitive recording material comprises a heat-sensitive color developing layer containing a normally colorless or pale color developable compound, and a developable compound capable of color developing the color developable compound at a heating time as essential components on a support. In this material, a using amount of a bis(3-allyl-4-hydroxyphenyl)sulfone having an α-type crystal type and containing a 3-dipentylamino-6-methyl-7- anilionofluoran as the color developable compound and a bis(3-allyl-4- hydroxyphenyl)sulfone having an α-type crystal type as the developable compound is 1.5 or less to the 3-dipentylamino-6-methyl-7-anilinofluoran by weight. |
