| abstract |
(57) [Problem] To provide a heat-sensitive recording medium which is excellent in storage stability of a recording part and is excellent in background fog resistance. SOLUTION: In a heat-sensitive recording material having a heat-sensitive coloring layer containing a leuco dye, a color developer and a storage stability improving agent on a support, as one means for solving the above-mentioned problems, as a color developer, Np-toluenesulfonyl-N'- Using 3- (p-toluenesulfonyloxy) phenylurea and 1,3,5-tris (4- At least one selected from tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanuric acid and a compound represented by the following general formula (1) is used. Embedded image |