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Why use 2 grades of inorganic sunscreens?
Kao almost always use 2 grades of inorganic sunscreens in their sunscreens (“regular” and “micronized”). Does anyone know why? Using just the micronized type would be easier…
Here there is an example: -
3 Replies
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That’s…interesting - I’ve never seen that on an ingredient list before. Then again, putting “micronized Zinc Oxide” on an ingredient label would be (technically) illegal in the US.
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Bobzchemist: in Japan, if a product has any whitening ingredient approved by the Japanese government it’s called a quasi-drug, not a cosmetic. And if the sunscreen is a quasi-drug (bacause contains the whitening quasi-drug), you must show in the ingredients list if the inorganic actives are micronized, regular or both.
Japanese regulations for cosmetics are very different from the rest of the world… -
Good thing they didnt have regulators around when Geishas became prevalent.
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