| abstract |
(57) [Summary] [Problem] To provide a high-sensitivity heat-sensitive recording sheet capable of writing clear colors using a felt pen of any color. SOLUTION: 4-hydroxy-4 'is used as an organic developer. -N-butoxydiphenyl sulfone, and 1, 2-di (3-methylphenoxy) ethane, di (p-methylbenzyl) oxalate, p-benzylbiphenyl, β A heat-sensitive recording sheet containing at least one compound selected from the group consisting of benzyloxynaphthalene, 4-biphenyl p-tolyl ether and o-xylerin-bis- (phenyl ether). |