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Sunscreen Method Patented by Shiseido



Published November 22, 2005
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Patent No. US 6,749,838 B1: Shiseido Company Ltd., Tokyo, Japan, patented a sunscreen cosmetic containing a micro particle zinc oxide composite powder that is coated with a silicic anhydride and treated with a silicone on the surface. This composition is then dispersed in oil or water via a media-agitating mill or a high-pressure dispersing machine.


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