| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-sensitive recording material which is extremely high in coloring sensitiveness, imparts favorable image density even if printed by low-application energy, and also has the favorable preservation performance of a recording part image.SOLUTION: A developer is composed of one more kinds of phenol sulfonic acid aryl ester in a general formula (1), contains at least one or more kinds of sulfonamide-based compounds expressed by a general formula (2) as a sensitizer, and furthermore, contains at least one or more kinds of a sensitizer other than the first sensitizer. A ratio of the first sensitizer in the whole amount of the sensitizer contained in a heat-sensitive recording layer is not lower than 1 wt.% and not higher than 90 wt.%. |
