Zinc oxide is a very fine white powder that is non-nano and used for whitening, adhesion and UV protection. It is a perfect addition to mineral makeup, particularly in a foundation. While this is a non-bleeding colorant, if you add too much to your soap it can migrate into other colors in the soap design or stain washcloths. We recommend starting out at 1/16th to 1/8th teaspoon per pound for melt & pour soaps. For cold process, add 1 teaspoon of oxide to 1 tablespoon of a carrier oil like Sweet Almond or Olive Oil and mix well using a mini mixer. To create the color in the sample of cold process soap above, we used 1.25 teaspoons of colorant (about 0.15 oz before dispersing) in 1 pound of soap. For more information on oxides in soap, check out this blog post.
INCI: Zinc Oxide
Reply from Bramble Berry
Hi Belle! While this may offer some UV protection, it does not create sunscreen. Sunscreen is regulated by the FDA. This means if you claim your lotion is a sunscreen, it will need to be tested to prove that it's effective. That can be a long and expensive process, so you'll want to consider that beforehand. This
Etsy Updates Policies on Cosmetics Making Claims blog post has some great information on labeling that may help!
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