It’s okay if you color treat your hair. Hair strands are roughly 10% absorbent, and after 5 days, whatever bleach or dye you’ve put on your hair is not going to affect the results of your test.
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It’s okay if you color treat your hair. Hair strands are roughly 10% absorbent, and after 5 days, whatever bleach or dye you’ve put on your hair is not going to affect the results of your test.
