| 摘要 |
PURPOSE:To obtain heat-sensitive recording material, with which the keeping stability of color-developed image, especially image stability against oil, plasticizer or the like is improved more than ever by a method wherein at least one kind of organic phosphorous compounds represented by the specified general formulae is used as developer. CONSTITUTION:In the heat-sensitive recording material concerned, in which heat-sensitive color-developing layer mainly made of leuco dye and developer for thermally developing the leucodye is provided on base, at least one kind of organic phosphorous compounds represented by the formulae I and II is used as the developer. In the formulae, R1, R2 and R3 represent hydrogen atom, alkyl group, aryl group or aralkyl group. Since the heat-sensitive color developing layer in the heat-sensitive recording material contains organic phosphorous compounds represented by the formulae I and II, the material can have excellent keeping stability of color-developed image, especially image stability against oil and plasticizer. |
