What is a barber required to do before starting service on a new client?

A barber is required to perform a skin test before starting service on a new client to ensure that the client does not have any allergies or adverse reactions to the products that will be used during the service. This test is especially important when using hair dyes or any products that could potentially cause irritation or allergic reactions on the skin. By conducting a skin test, the barber prioritizes the health and safety of the client and helps to prevent any negative experiences during the service.

While ensuring the client is comfortable, asking for a full medical history, and offering complementary drinks can contribute to a positive overall experience, these actions do not address the critical need to prevent allergic reactions and safeguard the client's well-being as effectively as performing a skin test does.