| 摘要 |
PURPOSE:To provide the titled material reduced in the color formation in the ground part thereof and excellent in heat sensitivity during storage, by providing a water soluble high molecular layer on the surface of a heat sensitive layer containing 3-di-n-butyl-7-o-chloroanilinofluorane as a leuco dye and the color coupler thereof. CONSTITUTION:A heat sensitive color forming layer containing 3-di-n-butyl-7-o- chloroanilinofluorane as a leuco dye and the color coupler thereof is provided on a support to constitute a heat sensitive recording material. By further providing a water soluble high molecular (e.g., polyvinyl alcohol) layer on the aforementioned heat sensitive color forming layer, the heat sensitive recording material reduced in the color formation in the ground part during storage and excellent in heat sensitivity is obtained. The aforementioned water soluble high molecular layer is provided within a range of 0.3-10g/m<2>, pref., 1-6g/m<2>. |
