What is a common effect of blow drying hair?

The common effect of blow drying hair resulting in it appearing smooth and voluminous is largely due to the heat applied during the process. When hair is blow-dried, the heat helps to eliminate moisture, which can result in a smoother texture by reducing frizz and helping the hair cuticles to lie flat. This smoothness often reflects light better, giving the hair a shinier appearance.

Additionally, blow drying can add volume at the roots, especially if the hair is lifted slightly while drying. Specific techniques, such as using a round brush during blow drying, can enhance the structure and body of the hair, creating a fuller look. This combination of smoothness and volume is typically a desired outcome in hairstyling, making blow drying a popular method in hair care and styling routines.

While other options may hold some truth under certain circumstances, they do not capture the primary and most common effect of blow drying hair as accurately as the voluminous and smooth finish.