New Jersey Cosmetology State Board Practice Exam 2025 – Complete Prep Guide

Applying a barrier cream is crucial when performing chemical treatments on the hair because it forms a protective layer on the scalp. This helps to prevent irritation and potential burns from harsh chemicals often found in products such as relaxers, bleaches, or permanent color. The barrier cream essentially acts as a shield, mitigating the risk of skin sensitivity and allergic reactions that could occur during the chemical process.

While covering the scalp with a towel, using a plastic cap, or keeping the hair dry may be relevant in certain contexts or procedures, they do not provide the direct protective benefit against chemical burns or irritation as effectively as a barrier cream does. The primary function of the barrier cream is to ensure client safety and comfort during a process that involves strong chemicals, making it an essential step in preparation for such treatments.