Analysis of Morphological Changes on the Hair Surface by Heat Perm Treatment Method

Frequent chemical treatments, such as dyeing and permanent waving, as well as the widespread use of heat-based hair styling devices, like flat irons and curling irons, can cause significant damage to hair fibers, leading to various adverse effects, such as dryness, breakage, split ends, and frizziness. Recently, there has been a trend towards using direct heat perms because they are time-saving, shorter in duration, and less complicated. However, as the damage to hair caused by direct perms increases, this study compares and analyzes the degree of damage to hair fibers caused by both direct heat perms and softening heat perms. Moreover, by comparing, analyzing, and evaluating the morphological changes to the hair surface and cross-section after each type of perm treatment based on hair condition, this study aims to objectively understand the effects of heat perms on hair and provide basic data for further research in this field.