What does a barber need to perform before carrying out a chemical service?

A barber must perform a patch test for allergies before carrying out a chemical service to ensure the client's safety and avoid adverse reactions. A patch test involves applying a small amount of the chemical product to a discreet area of the client's skin, allowing the barber to observe for any signs of irritation or allergic reaction. This step is particularly important for products that contain strong chemicals, as some clients may have sensitivities that are not immediately apparent.

While additional steps like a full consultation review and obtaining consent from the client are important practices in the service process, they do not specifically address the need to check for allergic reactions to the chemicals being used. A safety briefing session, while beneficial in communicating general safety protocols, is not a substitute for the specific health precaution of performing a patch test.