| 摘要 |
PURPOSE:To obtain a laminate reversibly changing from gold color to a colorless state by using a layer consisting of a gold metallic gloss pigment and a film forming material and adjusting the wavelength of refleced light as a first layer and employing a layer made of a thermal discoloring material, in which the lightness value of color concentration under the state of color developing and the lightness value of the colorless state under a decolored state have different characteristic values respectively, and the film forming material as a second layer. CONSTITUTION:A layer composed of a gold metallic gloss pigment, in which the optical thickness of a coating layer, in which the surface of natural mica is coated with 41-44wt.% titanium oxide, is 180-240nm and grain size is 5-60mum, and a film forming material and adjusting the wavelength of reflected light is used as a first layer 3. A layer made of a thermal discoloring material, which is made up of an electron donative compound, an electron acceptable compound and an organic compound medium reversibly generating both coloration reactions and in which the lightness value of color concentration under the state of color developing is six or less and the lightness value of a colorless state under a decolored state is eight or more, and the film forming material is employed as a second layer 2. Accordingly, a laminate thermally discolored from a gold color to a colorless state reversibly can be obtained. |
