Oregon Cosmetology Certification Practice Exam

Before performing any chemical treatment on hair, conducting a patch test is crucial. This test helps to determine if the client is sensitive or allergic to the chemicals that will be used during the treatment. By applying a small amount of the product to the skin, usually behind the ear or on the inner arm, you can observe for any adverse reactions such as redness, itching, or swelling. This precaution is essential for ensuring the safety and comfort of the client, as some individuals may have sensitivities to certain ingredients that could lead to severe allergic reactions if not identified beforehand.

Other steps, while important in the overall process, do not serve the same critical purpose as conducting a patch test. For instance, applying heat or brushing the hair is generally done during the treatment process itself. Washing with shampoo is typically a preparatory step but does not address potential allergic reactions, which can be life-threatening. Thus, the patch test stands out as a fundamental initial step in safeguarding clients’ health before initiating chemical treatments on their hair.