| 摘要 |
PURPOSE:To improve heat resistance, dynamic color developing sensitivity, PCS value, etc., by using a specific leuco dye at a melting point of developer at a specific temperature. CONSTITUTION:A melting point of developer is 180-240 deg.C, and leuco dye is 3-di-n-butylamino-6-methyl-7-anilinofluoran and/or 3-di-n-amylamino-6-methyl-7- anilinofluoran. Since an intermediate layer having very high heat insulation and improved adhesive properties with a thermal head is formed of non-foamed plastic fine hollow particles each having a mean particle diameter 2-10mum and percentage of hollowness of 90% or greater as main component, dynamic color developing sensitivity is improved by effectively utilizing thermal energy from the head, etc., and further improving adhesion with the head from the heat insulation of the layer. |
