| 摘要 |
PROBLEM TO BE SOLVED: To improve heat resistant preservability with high sensitivity by incorporating a material containing a leuco dye or a developer as a main component in a heat fusion bondable material fused at a specific temperature. SOLUTION: In the heat sensitive recording material having a heat sensitive recording layer containing a leuco dye and a developer for color developing the dye when overheated on a support, a material containing the due or the developer as a main component is contained in a wax having a melting point of 60 to 150 deg.C. Its preserving stability is improved by surrounding the dye or the developer entirely with a heat fusion bondable material fused at 60 to 150 deg.C, and forming a barrier. As the material to be fused at 60 to 150 deg.C, a carnauba wax, a candelilla wax, a japan wax, a beeswax, a ceresin wax, a montan wax and its derivative, a paraffin wax and its derivative, a microcrystalline wax and its derivative, a Fischer-Tropsh wax, a polyethylene or the like is used. |
