| abstract |
(57) [Summary] [Structure] A thermosensitive recording material having, on a support, a thermosensitive coloring layer containing a coloring substance composed of a colorless or light-colored leuco dye and a developer which reacts when heated to develop the coloring substance. 2. A heat-sensitive recording material comprising a mixture of 2,4'-dihydroxydiphenyl sulfone and 4,4'-dihydroxydiphenyl sulfone as a color developer. [Purpose] The purpose of the present invention is to provide a thermosensitive recording material having excellent properties such as sufficiently high color density and color sensitivity, excellent color developability, and good image storability (weather resistance). Is. |