| abstract |
(57) [Summary] [Structure] Organic developer, basic colorless dye of formula (I), 1,2-di (3-methylphenoxy) ethane, di (p-methylbenzyl) oxalate, β- A heat-sensitive recording sheet having a color forming layer containing a sensitizer selected from benzyloxynaphthalene and 4-biphenyl p-tolyl ether. [Chemical 1] [Effect] High sensitivity and excellent image oil resistance. |