What is the first step in performing a chemical treatment?

Conducting a patch test is an essential first step in performing a chemical treatment because it helps assess the client’s sensitivity to the chemicals being used. This precautionary measure involves applying a small amount of the chemical to a discreet area of the client's skin, typically behind the ear or on the inner elbow, and observing for any adverse reactions such as redness, itching, or swelling.

By doing a patch test, a barber can ensure the safety and well-being of the client, preventing potential allergic reactions that could lead to serious damage or discomfort. It is a standard practice that aligns with the principles of client care and product safety. Other options, such as preparing chemicals, consulting with the client, or sanitizing the workspace, while still important, follow after the initial assessment of skin sensitivity to ensure a safe and effective chemical treatment process.