What should a cosmetologist do before applying dye during a hair coloring service?

Before applying dye during a hair coloring service, it is essential for a cosmetologist to perform a patch test. This procedure is crucial for identifying any potential allergic reactions to the hair dye, which can contain various chemicals that may cause sensitivity or adverse effects on a client's skin. By conducting a patch test, usually done by applying a small amount of dye to an inconspicuous area of skin, the cosmetologist can ensure that the client does not experience irritation or an allergic response, promoting a safe and comfortable coloring experience.

Performing the patch test also aligns with safety protocols and industry standards, helping to minimize liability issues for both the cosmetologist and the salon. This proactive measure is a fundamental part of responsible client care and is a practice that should never be overlooked prior to any hair coloring service.