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Hello, I would like to know Zinc Oxide 200nm EasyDisperse™ and Titanium Dioxide 200nm EasyDisperse™ each How much is 1% SPF? How do you calculate it? Thank you KP

Hello, I'm going to make Liquid Foundation Sunscreen. My Skin's formula will order the following substances, many of the same names. Which one should I buy? - Oil Thick™ 2% Oil Thick There are many of them. I'm not sure which one to order. Please send me a link. - mineral oil 5% There are many, not ...