| 摘要 |
PROBLEM TO BE SOLVED: To obtain a multi-color changing pigment which changes its color according to the observation direction by coating a flaky mica substrate with a compound oxide containing titanium, cobalt and aluminum. SOLUTION: Preferably a flat-shaped mica powder having a particle size of 1-150μm is firstly coated with titanium dioxide, then coated with a compound oxide of cobalt and aluminum and baked at 700-1,100 deg.C. Preferable blending composition is titanium oxide: 50-91.5 mol%, cobalt: 7.5-49 mol%, aluminum: 1-20 mol%, which exhibits yellowish green. When white light 18 is radiated to the mica coated with Ti-Co-Al compound oxide 10, a part of the light is reflected at the surface of the Ti-Co-Al compound oxide layer 16 as reflected light 20. The rest of the light 18 which is not reflected goes in, gives reflected light 22 at the titan dioxide layer, reflected light 24 at the mica surface and reflected interference light 26 having a specific color. Accordingly, different colors can be seen according to the angle.
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