Morphological Damage Procedures of Hair surface treated with repetitive Oxidation Coloring Agent

Abstract

Background/Objectives: People apply permanent hair dyes in various colors to change their hairstyle orappearance. Frequent dyeing damages the hair cortex and cuticle layer.Method: In this study, a permanent coloring agent was applied to normal hair five times consecutively andthe damage on the hair surface was observed with a scanning electron microscope (SEM).Findings: In this study, the hair surface was continuously damaged as the number of permanent dyeingprocedures increased. As the number of permanent dyes applied increased, the surface of the repeatedlydyed hair cracked and was lost in the cells of the cuticle. As the number of dyeing procedures to the samehair increased, the surface area of the scales making up the hair became wider and some broken cellsremained attached to the surface of the hair scales.Improvements/Applications: Damage to hair due to dyeing was confirmed by scanning electron microscopy.This study indicated that frequent dyeing should be avoided in order to prevent excessive hair damage.