Chemical ServicesCâu 87 / 100
Highly alkaline chemical services can damage hair because raising the pH:
a.Closes the cuticle tightly
b.Adds pigment
c.Lowers porosity
d.Swells and opens the cuticle, which can weaken the strand if overdone
Giải thích
Alkaline products lift the cuticle so chemicals can penetrate, but excessive or repeated alkalinity leaves the cuticle raised and the hair porous and weak. Acid-balanced rinses afterward help reclose the cuticle.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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