Washington Barber License Practice Exam

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Prepare for the Washington Barber License Exam with this essential quiz. Challenge yourself with multiple-choice questions designed to enhance your knowledge and readiness for the licensing test. Get the confidence you need to excel in your barber career!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

The scalp and skin are protected from the active ingredient in the sodium hydroxide processor by a:

sodium hydroxide
gentian violet jelly
petroleum base
chemical relaxer

The correct answer is: petroleum base

Petroleum base. This option is correct because petroleum is a neutral substance that can act as a protective barrier between the skin and the active ingredient in sodium hydroxide. This helps to prevent chemical burns and irritation on the scalp and skin. Option A (sodium hydroxide) and option D (chemical relaxer) are both incorrect because they are the active ingredients in the sodium hydroxide processor and are responsible for straightening the hair, not protecting the skin. Option B (gentian violet jelly) is also incorrect because it is an antiseptic dye that is used to treat fungal infections, and does not provide any type of protective barrier for the skin.