why does mineral sunscreen say to “reapply at least every two hours” when it’s still visibly on the skin’s surface at the end of the day?
In: Chemistry
Because they take the average amount of time people need to reapply based on perspiration. And just because there is still some visible on your skin doesn’t mean the coverage is unaffected. You could have large patches missing or thinned considerably, thereby significantly reducing it’s efficacy. Reapplying is precautionary.
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