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What should be done prior to performing a chemical service on a client?

  1. Perform a thorough shampoo

  2. Conduct a skin analysis

  3. Perform a patch test for allergies

  4. Request the client’s health history

The correct answer is: Perform a patch test for allergies

Before performing a chemical service, conducting a patch test for allergies is essential. This procedure involves applying a small amount of the chemical product to a discreet area of the client's skin to observe any adverse reaction. It is a crucial safety measure that helps to prevent allergic reactions that could result in skin irritation, burns, or other harmful effects. The patch test allows the barber to assess the client's sensitivity to the chemicals, ensuring that they can safely proceed with the service. This is particularly important for chemical treatments that involve strong substances, which may pose risks for clients with sensitive skin or pre-existing conditions. While the other options also hold relevance in the context of client care, they do not specifically address the immediate need to evaluate potential allergies before undergoing a chemical service.