1999 年 26 巻 2 号 p. 42-
We developed SiO_2 nm ultra thin film coating methods on the surface of innorganic pigments for preventing the skin damages by metallic ions with moderate hydrolysis of tetraethoxysilane without catalyst. We improved metallic ion's protectivity, color brightness, dispersibility, dosage, anti-oxidation ability, photochemical interaction and mechanical property.