BrainStuff

BrainStuff Classics: How Does Hair Dye Work?

Sep 8, 2018 · 4 min · 4.3 MB
0:00-4:28

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Some hair dyes are basically fine-grained paint, but dyes that stick with you for more than a couple weeks physically and chemically change each hair. Learn how in this episode of BrainStuff.

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