| 摘要 |
PURPOSE:To obtain a heat-sensitive recording material having excellent picture stability, good color density even when recorded at high speed and free of color disappearance with time by using a combination of specific proportions of two specific compounds as developing agents. CONSTITUTION:In a heat-sensitive recording material in which a heat sensitive chromogenic layer composed primarily of a colorless or light color chromogenic substance (e.g., Crystal violet lactone, etc.) and a developing substance to cause the chromogenic substance to color when heated is provided on a supporter, as the developing substance, a combination of 3:7-7:3 weight proportions of bisphenol-A and 4,4'-dihydroxydiphenylsulfone is used. The recording material is excellent in picture stability and free of color disappearance with time, as well as having good color density during high-speed recording. |
