| 摘要 |
PURPOSE:To obtain a thermally color-changeable laminate reversively discoloring especially from a metal gloss color to a colorless state by laminating a first layer consisting of specific metallic gloss pigment having a metallic color and a film forming material and a second layer consisting of a specific thermally discoloring material and a film forming material. CONSTITUTION:A thermally color-changeable laminate reversibly discoloring from a metal glass color to a colorless state is constituted by laminating a first specific layer and a second specific layer. The first layer 3 is formed from metal gloss pigment having a metallic color obtained by coating the surface of natural mica with 45-58wt.% of titanium pigment in an optical thickness of 245-415nm and having a particle size of 5-60mum and a film forming material. The second layer is formed from a thermally discoloring material consisting of an electron donating compd. an electron acceptive compd. and an org. compd. medium reversibly generating the color reaction of those compds. and characterized by that the brightness value of color density is 6 or less in a developed color state and 8 or more in an erased color state and a film forming material. |
