Red Seal Cosmetology Practice Exam

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Alkaline waves are also known by which term?

  1. Heat waves

  2. Cold waves

  3. Neutral waves

  4. Acid waves

The correct answer is: Cold waves

Alkaline waves are also known as cold waves because they use ammonium thioglycolate and have a higher pH level, making the solution feel cool on the scalp. Heat waves use glyceryl monothioglycolate and have a lower pH level, causing the solution to feel warm on the scalp. Neutral waves use both ammonium thioglycolate and glyceryl monothioglycolate in equal amounts, resulting in a neutral pH level and no temperature change on the scalp. Acid waves use glyceryl monothioglycolate and have a lower pH level, making the solution feel hot on the scalp. Therefore, options A, C, and D are incorrect.

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