A heat-sensitive recording sheet comprises an electron donative leuco dye, an acidic developer for developing the dye, and a sensitizer. The acidic developer has a main component of a phenolic compound that contains a sulfonyl group in a molecule. The sensitizer comprises an amide compound, N-(4-tolyl) -phenylacetic amide. An amide compound to be mixed with the N-(4-tolyl)-phenylacetic amide for use in the sensitizer is at least one compound selected from the group consisting of N -cyclohexylphenylacetic amide, N-phenylphenylacetic amide, N-(2-tolyl)phenylacetic amide, N-phenylphenoxyacetic amide, N-(4-tolyl)phenoxyacetic amide, N-phenyl-(4-tolyloxy)acetic amide and N-(4-tolyl)-(4-tolyloxy)acetic amide.
一种热敏记录片包括一种电子捐赠型白兰地
染料、一种用于显影该
染料的酸性显影剂和一种敏化剂。酸性显影剂的主要成分是分子中含有磺酰基的
酚类化合物。敏化剂包括一种
酰胺化合物,即 N-(4-
甲苯基)-
苯乙酸酰胺。与 N-(4-
甲苯基)-
苯乙酸酰胺混合用于敏化剂的
酰胺化合物是至少一种选自 N-
环己基苯乙酸酰胺的化合物、N-
苯基
苯乙酸酰胺、N-(2-
甲苯基)
苯基
乙酸酰胺、N-
苯基
苯氧基
乙酸酰胺、N-(4-
甲苯基)
苯氧基
乙酸酰胺、N-
苯基-(4-
甲苯氧基)
乙酸酰胺和 N-(4-
甲苯基)-(4-
甲苯氧基)
乙酸酰胺。