Colorado Cosmetology Written Practice Exam

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What type of hair removal uses a caustic alkali preparation?

Depilatories
Electrolysis
Laser hair removal
Waxing

The correct answer is: Depilatories

The correct answer is depilatories. Depilatories are products specifically designed for hair removal that contain a caustic alkali preparation, which breaks down the protein structure of the hair, allowing it to be easily wiped away from the skin's surface. This process typically involves a cream or lotion that is applied to the unwanted hair and is left on for a short period before being removed. In contrast, electrolysis involves the use of electric current to destroy hair follicles, making it a method of permanent hair removal rather than a topical application like depilatories. Laser hair removal uses concentrated light beams to target and destroy hair follicles, which is also fundamentally different from a caustic chemical process. Waxing is a mechanical method of hair removal that involves applying a sticky substance to the hair and pulling it out from the root, without any use of caustic materials. Understanding these differences highlights why depilatories are classified specifically for their use of caustic alkali for the effective removal of hair.