Wyoming State Board Cosmetology Practice Exam 2025 - Free Cosmetology Exam Questions and Study Guide

A round brush is particularly effective for smoothing hair during a blowout due to its unique shape, which allows for better styling control and the ability to create volume at the roots. The cylindrical nature of a round brush helps to grip the hair more effectively while the heat from the blow dryer is applied, enabling the stylist to smooth the hair cuticle, leading to a shinier, sleeker finish. As the stylist pulls the brush through the hair, they can also create curls or waves, adding versatility to the blowout.

In contrast, a paddle brush is generally used for detangling and straightening hair but may not provide the same level of control for smoothing and styling as a round brush does. A vent brush, designed with widely spaced bristles, is great for quick-drying but is less effective at smoothness and volume. Meanwhile, a bristle brush is typically used on dry hair to polish and shine but may not deliver the necessary movement and styling aid during the blowout process. Therefore, the round brush stands out as the superior choice for achieving a smooth blowout finish.