Chemical ServicesCâu 81 / 100
A permanent wave (perm) changes the hair by:
a.Only wetting the hair
b.Removing pigment
c.Breaking and then reforming the disulfide bonds around a rod to create curl
d.Coating the cuticle with wax
Giải thích
A perm uses a waving lotion to break disulfide bonds while the hair is wrapped on rods, then a neutralizer reforms the bonds in the new curled shape. The size of the rod determines the tightness of the curl.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- The natural pH of healthy hair and skin is approximately:
- A conditioner or acid-balanced rinse generally helps to:
- Chemical hair relaxers work by:
- In permanent waving, the neutralizer (fixative) is applied to:
- A patch (predisposition) test is performed before certain color services to:
- Which type of haircolor lasts the longest and involves a chemical change within the hair?
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Đội Ngũ Biên Tập PrepPass · Đối chiếu với California Barber Written Licensing Exam · Quy trình kiểm tra