New York State Barber Practice Exam

The primary function of a diffuser in hairstyling is to reduce frizz and enhance natural curls. A diffuser is an attachment for a blow dryer that helps to distribute airflow more evenly, which minimizes the impact of direct heat on the hair. This gentle drying method allows curls to dry without being disturbed, helping to maintain their shape and definition.

Using a diffuser can also help to reduce frizz, as it prevents hair from being blown about excessively, which can cause the outer cuticle of the hair to become raised, leading to a frizzy appearance. The technique involved in using a diffuser often includes scrunching the hair and lifting the curls as they dry, further promoting a defined and bouncy curl pattern.

The other options suggest functions that do not align with the primary use of a diffuser. Straightening hair typically involves the use of flat irons or specific techniques, while adding volume usually requires different styling tools or products. Speeding up the drying process can happen with a regular blow dryer, but the diffuser's role is more about enhancing texture rather than merely drying hair faster.