Washington Cosmetology License Practice Exam

What should a cosmetologist do before performing a chemical service?

1. Conduct a skin analysis

2. Perform a patch test for allergies

3. Use a deep conditioning treatment

4. Consult with another cosmetologist

The correct answer is: Perform a patch test for allergies

Before performing a chemical service, a cosmetologist must perform a patch test for allergies. This is essential because it helps identify any potential allergic reactions a client may have to the chemical substances used during the service. Chemical services can involve strong formulations that may cause adverse reactions in some individuals, and a patch test provides a safe way to check for sensitivities. While conducting a skin analysis is important in assessing the client's overall hair and scalp condition, it does not specifically address potential allergic reactions to chemical ingredients. Similarly, using a deep conditioning treatment may improve the hair's condition but does not evaluate the client's sensitivity to products. Consulting with another cosmetologist may be beneficial for advice or specific techniques, but it does not fulfill the critical requirement of ensuring client safety through allergy testing. Thus, performing a patch test is a vital step that directly protects clients and helps ensure the successful outcome of the chemical service.