| 摘要 |
PROBLEM TO BE SOLVED: To obtain cerium oxide composite particles, excellent in ultraviolet screening properties, hardly causing deterioration of other coexisting cosmetic substrates, hardly having optical activities, having slipping properties on the skin, and suitable for cosmetics providing beautiful finish. SOLUTION: This composite particles for cosmetics are obtained by covering 3-70 wt.% cerium oxide having 0.01-0.5μm number average particle diameters and 0.7-0.15 half value width 2θ( deg.) at 28.6 deg. diffraction angle (111 plane) in the X-ray diffraction, on the surface of mother particles having 0.3-50μm number average particle diameters.
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