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Abstract

A heat-sensitive recording material is proposed, which comprises a substrate and a heat-sensitive recording layer that contains color formers and color acceptors, where the color formers are selected from the list comprising: 3-diethylamino-6-methyl-7-anilinofluoran, 3-dibutylamino-6-methyl-7-anilinofluoran, 3-(N-methyl-N-propyl)amino-6-methyl-7-anilinofluoran, 3-(N-ethyl-N-isoamyl)amino-6-methyl-7-anilinofluoran, 3-(N-methyl-N-cyclohexyl)amino-6-methyl-7-anilinofluoran, 3-(N-ethyl-N-tolyl)amino-6-methyl-7-anilinofluoran, and 3-(N-ethyl-N-tetrahydrofuryl)amino-6-methyl-7-anilinofluoran, the heat-sensitive recording layer contains two color acceptors, which are: N-(p-toluenesulfonyl)-N'-3-(p-toluenesulfonyloxyphenyl)urea with the following formula (1): ##STR00001## and a urea-urethane compound with the following formula (2): ##STR00002## where the ratio of the two color acceptors, i.e., the ratio of N-(p-toluenesulfonyl)-N'-3-(p-toluenesulfonyloxyphenyl)urea according to formula (1) to the urea-urethane compound according to formula (2), is in the range of (1:greater than 1) to (1:3), based on wt. % in the heat-sensitive recording layer.

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