What should clients be advised to do before a color treatment?

Performing a patch test to check for allergies is essential before a color treatment. This test involves applying a small amount of the color product to a discreet area of the client's skin, usually behind the ear or on the inner elbow, and observing it for any adverse reactions, such as redness, itching, or swelling. This precaution helps ensure that the client does not have a sensitivity or allergy to the chemicals in the dye, which can prevent serious skin reactions or complications during or after the coloring process.

This practice is vital in the beauty industry, as safety and client well-being are paramount. By verifying that the client can tolerate the color treatment formulation, barbers promote a safer salon environment and enhance the overall client experience.