| 摘要 |
<p>PURPOSE:To provide a thermal recording medium which can be reproduced to a general paper and imparts a clear type image by reduced heat pulses comprising providing a specific heat meltable ink layer to a back surface of a substrate material having a heat sensitive color developing layer on a surface thereof. CONSTITUTION:On a surface of a substrate material 1 having a thickness of 20- 60mu, a density of 0.75-1.3g/cm<2> and Bekk smoothness of a back surface of 60-20 thousand sec., a heat sensitive color developing layer 2 comprising a dyestuff precursor developing a color when reacted with an acid and an org. or an inorg acid being a (semi)solid at a room temp. is provided in a thickness of 10mu or less and, on a back surface thereof, a heat meltable ink having a pressure sensitive transfer property with a viscosity of 20-200cp (100 deg.C, a B type viscometer) comprising a powdery heat conductive substances such as a black pigment or a powdery metal pigment with heat conductivity of 6.0X10<-4>-25.0X10<-4>cal/sec.cm. deg.C and a solid wax with a needle penetration degree of 10-30 (25 deg.C) is coated in an amount of 1-15g/m<2> to provide a heat meltable ink layer 3.</p> |
