| 摘要 |
PURPOSE:To provide the titled recording material capable of forming a color in high density and having excellent preservation stability, wherein a specified oxygen-containing compound is used as a color forming assistant together with a diazonium salt, a coupler compound and a color developer. CONSTITUTION:In a fixed-type thermal recording material wherein a photosensitive thermal layer comprising a diazonium salt, e.g., 2,5-diethoxy-4-morpholinobenzenediazonium tetrafluoroborate, a coupler compound, e.g., 2-hydroxy-3-naphthoic acid 2'-ethoxyanilide, a color forming adjuvant and a particulate dispersed material of an organic basic compound giving a basic atmosphere by being melted when being heated, e.g., a compound of formula I , as a color devloper is provided on a base, an oxygen-containing compound of formula I , wherein each of R1 and R2 is H, chain or cyclic alkyl, aryl or the like, preferably having a melting point of 70-135 deg.C, e.g., triphenylcarbinol cyclohexyl ether, is used as the color forming assistant, preferably in an amount of 0.1-20 times by weight with regard to the diazonium salt. |
