What is a common use for curling irons in cosmetology?

The primary function of curling irons in cosmetology is to create curls or waves in the hair. These tools utilize heat and a cylindrical design to reshape straight hair into defined curls or looser waves, depending on the technique and type of iron used. Many stylists rely on curling irons to achieve a variety of looks, from tight ringlets to soft beachy waves, making them essential for hairstyling.

While curling irons may indirectly add some volume to hair or assist in smoothing frizz when used correctly, these are not their main purposes. Instead, they are specifically designed to enhance texture through curls, which allows for versatility in styling options. Thus, the use of curling irons is best identified with creating curls.