To provide a developer and an image stabilizer that can provide a thermosensitive recording material excelling in preservability of an image part, particularly in oil resistance and plasticizer resistance, further excelling in preservability of a color undeveloped part, particularly in heat resistance, and to provide the thermosensitive recording material excelling in preservability using the developer and the image stabilizer.

The thermosensitive recording material is formed by providing, on a support body, a thermosensitive color-developing layer containing the developer, leuco dye and a diphenylsulfone derivative of different structure as the image stabilizer, wherein the developer is a mixture of a diphenylsulfone-crosslinked compound and a diphenylsulfone derivative which is a reaction product of dihydroxydiphenylsulfone and 4,4'-bis(halo methyl)biphenyl, in which at least one of terminal groups is a halogenated methyl group.

COPYRIGHT: (C)2010,JPO&INPIT