| abstract |
(57) [Problem] To provide a heat-sensitive recording material having good coloring properties and excellent image storability. Kind Code: A1 A thermosensitive recording comprising a support provided with a colorless or pale-colored leuco dye as a color-forming substance, and a thermosensitive coloring layer containing a sensitizer and a color-developing substance which reacts upon heating to form the color-forming substance. In the material, the developer is 4,4'-dihydroxydiphenylsulfone, 2,4'-dihydroxydiphenylsulfone or a mixture of 4,4'-dihydroxydiphenylsulfone and 2,4'-dihydroxydiphenylsulfone, A thermosensitive recording material, wherein the agent is a diphenyl sulfone compound represented by the general formula [1] and a polycyclic aromatic hydrocarbon, aromatic ether compound or aromatic ester compound. Embedded image |