Kentucky Cosmetology State Practice Exam 2025 - Free Cosmetology Practice Questions and Study Guide

A round brush is particularly effective for smoothing hair during blow-drying because of its design, which allows for improved tension and control as you style. The round shape enables the stylist to curl the hair around the brush while applying heat from the blow dryer, resulting in a smooth and polished finish. This technique not only helps to straighten the hair but also adds volume and bounce, which are key attributes desired in many hairstyles.

The bristles on round brushes are often designed to grip the hair and distribute heat evenly, further enhancing the smoothing process. This makes them suitable for achieving a sleek look while also providing the flexibility to create waves or curls if desired.

In contrast, flat brushes tend to be better suited for detangling and are not ideal for the curling motion that helps smooth the hair. Vent brushes have openings to allow airflow, making them effective for quick drying, but they do not provide the same level of smoothing as a round brush. Teasing brushes are specifically designed for adding volume and texture by backcombing, which is the opposite of what is needed for straightening and smoothing hair.