| 摘要 |
PROBLEM TO BE SOLVED: To provide useful granules whose color is changed with water, wherein satisfying color density is achieved when an electron-donating and coloring organic compound develops color even in repeated use while colorful and vivid color tone due to the electron-donating and coloring organic compound is visible when dried and color tone due to color-developing inorganic particles is visible when water is absorbed; and a laminate whose color is changed with water using the same.SOLUTION: The granules whose color is changed with water comprises an electron-donating and coloring organic compound and color-developing inorganic particles with an average particle size of 0.1-20 μm and an average pore diameter of 1-50 nm which allow the electron-donating and coloring organic compound to color, wherein the electron-donating and coloring organic compound is adsorbed to the surface of the color-developing inorganic particle. The laminate 1 whose color is changed with water is obtained when a layer 3 whose color is changed with water is provided on a substrate 2. The layer 3 comprises the granules whose color is changed with water and a binder resin and develops color when dried and loses the color when water is absorbed. |
