Chemical ServicesCâu 80 / 100
Chemical hair relaxers work by:
a.Adding curl to straight hair
b.Breaking disulfide bonds to straighten curly or coiled hair
c.Only coating the surface temporarily
d.Cleansing the scalp
Giải thích
Relaxers use strong chemicals to break the hair's disulfide bonds, allowing the coil pattern to be smoothed straight before the hair is neutralized. Because they are highly alkaline, they must be applied carefully to avoid scalp burns.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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