Hair Shaft Damage from Heat and Drying Time of Hair Dryer

The study investigated the effects of different hair drying methods on hair shaft damage, moisture content, and color. It found that blow drying caused more surface damage than air drying, with higher temperatures and closer distances resulting in greater damage. Towel drying also caused significant damage due to mechanical friction. Surprisingly, natural drying damaged the cell membrane complex (CMC) due to prolonged water exposure. Moisture content decreased in all treated groups, but differences were not statistically significant. Hair color lightened with repeated treatments, especially under ambient and 95℃ conditions. The study concluded that using a hair dryer at a lower temperature and greater distance minimized hair shaft damage.