Diffusing Curly Hair: A Temperature Guide

The primary function of a diffuser is to reduce the velocity of the air emitted by a hair dryer. When air is dispersed through the fingers of the attachment, the curls remain undisturbed, which prevents the formation of frizz. Understanding the thermal settings is the difference between a controlled finish and a dehydrated result.

Heat serves one purpose: to accelerate the evaporation of water from the hair shaft. Excessive heat does not expedite the setting of the curl pattern, but it does strip the cuticle of necessary moisture. Use these instructions to manage your drying time without compromising hair health.

1. Apply product to damp hair. Distribute your styling product through hair that is soaking wet. Use a micro-fiber towel to remove excess water by blotting rather than rubbing. Your hair should be damp to the touch, not dripping.
2. Set the dryer to low heat. Select the lowest heat setting on your appliance. High heat causes the surface of the hair to expand too quickly, which results in loss of definition. Keep the airflow setting on medium for consistent distribution.
3. Hover diffuse the roots. Hold the diffuser stationary around your head without touching the hair. Focus the airflow on the roots to provide lift and volume. Keep the dryer at least six inches away from the scalp throughout this phase.
4. Cup the ends. Once the roots feel dry, move to the mid-lengths and ends. Place sections of hair into the diffuser bowl and lift toward the scalp. Hold for thirty seconds per section to encourage the curl pattern to retract.
5. Cool air set. Switch your dryer to the cool-shot button. Run the cool air over the entire head to seal the cuticle and lock in the shape. This final step removes residual heat and increases shine.

Efficiency in drying is measured by the retention of the curl, not the speed of the heat.