Wyoming State Board Cosmetology Practice Exam 2025 - Free Cosmetology Exam Questions and Study Guide

Question: 1 / 400

What should be done before applying any chemical treatment to hair?

Wash the hair

Perform a patch test

Before applying any chemical treatment to hair, it is essential to perform a patch test. This procedure involves applying a small amount of the chemical product to a discreet area of the skin, usually behind the ear or on the inner elbow, and observing for any adverse reactions. Conducting a patch test helps to identify potential allergies or sensitivities a client may have to the chemicals, thereby preventing skin irritation, allergic reactions, or other adverse effects during the treatment process.

Washing the hair, cutting it, or styling it before applying the chemical does not provide the necessary safety check for allergies that a patch test does. While preparing the hair can be important for optimal results, ensuring that the client does not have an adverse reaction to the chemicals being used takes precedence.

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Cut the hair

Style the hair

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