| 摘要 |
PURPOSE:To enhance the light fastness of the thermally discoloring layer of a system using a thermally color changeable material developing and losing a color by the giving and receiving reaction of an electron between an electron donating color forming org. compd. and an electron acceptive compd. CONSTITUTION:A thermally color-changeable laminate is obtained by laminating a light barrier pigment layer 3 wherein light barrier pigment selected from metal gloss pigment, transparent titanium dioxide, transparent iron oxide, transparent cesium oxide and transparent zinc oxide is fixed to a film forming material in a dispersed state on a thermal discoloring layer 2. Since the light barrier pigment layer 3 permitting even a proper quantity of visible light to transmit in a degree not obstructing visual sensation, the color change of the thermal discoloring layer 2 is also visually confirmed. |
