Photochromic ultra-violet ray shield powder, method of...

Details Photochromic ultra-violet ray shield powder, method of... Photochromic ultra-violet ray shield powder, method of...

C - Chemistry, Metallurgy

09

C

C09C 1/36 (2006.01) C09C 1/00 (2006.01) A61K 7/42 (1990.01)

Patent

CA 2070749

A photochromic ultra-violet ray shield material principally composed of titanium oxide particles, which have a specific surface area of 25 m2/g or above and also have 4E=5 <= A (discoloration degrees) and B (at restoration) <= .DELTA.E=3, a method of manufacturing the same and a skin external preparation using the same. Both photochromic property and excellent ultra-violet ray shield effect are obtained.

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