Kentucky Cosmetology State Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Blow drying primarily serves to add volume and shape to hair through heat styling. When heat is applied during the blow-drying process, it alters the water content in the hair, allowing for the restructuring of the hair's shape. This means that the stylist can create volume at the roots and define the shape of the style, making it appear fuller and more polished.

Heat also aids in smoothing the cuticle layer of the hair, which gives a shiny finish while helping to set the hairstyle in place. The technique of blow drying is effective for creating various looks, whether it be sleek and straight or bouncy curls, by manipulating how the hair dries.

Other options, such as removing excess oil or locking in moisture, are not the primary functions of blow drying. While it may slightly remove some surface oil through the drying process, that is not its main purpose or impact on the hair. Similarly, blow drying does not lock in moisture; in fact, excessive heat can sometimes lead to dryness. Lastly, preventing breakage is important, but blow drying must be done correctly, with appropriate heat settings and techniques, to minimize any potential damage.