| 摘要 |
In a heat sensitive recording material comprising a substrate and a heat sensitive recording layer thereon incorporating a colorless or light-colored basic dye and a color acceptor which is reactive with the dye to form a color when contacted therewith, the recording material characterized in that at least one of the compounds of the formula (I) is contained in the heat sensitive recording layer <IMAGE> (I) wherein R1, R2, R3, R4, R5 and R6 are same or different and are hydrogen atom, halogen atom, C1 DIFFERENCE C5 alkyl or C1 DIFFERENCE C5 alkoxyl.
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