Chemical Services第 88 / 100 题
Before a relaxer, a protective base or barrier cream is applied to the scalp to:
a.Speed up processing
b.Protect the skin and scalp from the caustic chemical
c.Add curl
d.Cleanse the hair
解析
A protective base cream shields the scalp and hairline from the strong alkaline relaxer, reducing the risk of chemical burns and irritation. It is especially important with stronger, lye-based relaxers.
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