Colorado Cosmetology Written Practice Exam

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What is the pH range for alkaline perms?

4.5-7.0
7.5-8.0
8.0-9.0
9.0-9.6

The correct answer is: 4.5-7.0

Alkaline perms are types of perms that use a higher pH level in order to break down the hair's natural protein structure and create a new shape. The optimal pH range for alkaline perms is between 4.5-7.0 because this range is strong enough to break down the hair's protein bonds, but not too strong to cause excessive damage. Option B (7.5-8.0) would be suitable for acid perms, not alkaline, as this pH range is less damaging and has a weaker effect on hair structure. Options C (8.0-9.0) and D (9.0-9.6) are too high in pH and can cause excessive damage and over-processing of the hair, resulting in weaker, damaged hair. Therefore, option A is the correct answer as it falls within the recommended pH range for alkaline perms.