When should a patch test be performed?

A patch test should be performed before the first service with any new color to ensure that the client does not have an adverse reaction to the product. This is a critical safety step in the hair coloring process, as allergic reactions can occur due to ingredients in the dye. Performing this test allows the stylist to identify any potential allergies and minimize the risk of skin irritation or other allergic responses.

Conducting a patch test before using a new color is standard practice to protect the client’s health and safety. It involves applying a small amount of dye on a discreet area of skin, usually behind the ear or on the inner elbow, and waiting for a specified period—typically 24 to 48 hours—to observe for any signs of a reaction. This proactive measure helps to ensure a safe and pleasant experience for the client during hair coloring services.

In contrast, options suggesting that a patch test should be done only once a year or only if a previous color caused a reaction do not account for the varying formulations and ingredients in hair dyes. Additionally, suggesting that a patch test be performed every time color is applied does not take into consideration situations where the same formula is consistently used without issue, making it unnecessary. Thus, the most appropriate timing for a patch test is indeed