Chemical ServicesCâu 82 / 100
In permanent waving, the neutralizer (fixative) is applied to:
a.Reform the broken disulfide bonds and lock in the new curl
b.Break the bonds
c.Cleanse the scalp
d.Add permanent color
Giải thích
After the waving lotion softens and breaks the bonds, the neutralizer re-bonds the hair in its new curled configuration and stops the chemical action. Skipping or rushing neutralization leaves weak, unstable curls.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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