The Effect of Intermediate Treatment Using Natural Polyphenol Cross-linker on Perming Efficiency and Hair Protection

Abstract

This study investigated the effect of intermediate treatment using natural polyphenol cross-linking agent on perming efficiency and hair protection during Perm treatment. Among various polyphenols and organic acids, tannic acid and green tea extract, which are materials with high cross-linking efficiency, were selected as intermediate treatment agents, and a solution of optimal concentration of 1% was used for the intermediate treatment of the experimental group. As a result, first, when a wave Perm was performed using tannic acid and green tea extract as an intermediate treatment agent, both tannic acid and green tea extract groups showed higher perming efficiency and wave maintenance than the control group. In particular, green tea extract showed higher efficiency than tannic acid in improving the perming efficiency and hair protection of natural, permed and dyed hair. Second, tannic acid and green tea extract behaved as antioxidants, decreasing the hair damage caused by the oxidizing agent during the Perm process of the hair, thereby improving the tensile strength of the hair. Third, the hair surface of the experimental group was firmer and smoother than that of the control group, and in particular, the surface of the green tea extract experimental group was smoother than that of tannic acid experimental group. On the other hand, the cuticle surface of the control group appeared rough. This study showed that the natural polyphenol cross-linkers can be efficiently used as intermediate treatment agents during Perm treatment.