Comparative study of instrumental measurement and sensory evaluation methods for the repairing effect of mildly damaged hair bundles

Abstract

Objective: This study explores the applicability and scientific accuracy of instrument measurements in repairing hair products on slightly damaged hair bundles. Materials and method:Sixty hair bundles mildly damaged with hydrogen peroxide and ammonia standards were divided into two groups: the treatment and control groups (30 hair bundles each). The treatment group used commercial hair care essential oil, whereas the control group used tap water to treat the damage. The two groups were measured using an instrument before and after the product application. The objective indicators included the gloss of hair, along with hair cuticle dynamic friction coefficient, and against hair cuticle dynamic friction coefficient. At the same time, two evaluators conducted sensory evaluations on the gloss and frizz levels of the hair bundles. Therefore, data comparison and verification were carried out together with instrumental measurement data. Results:We verified that the instrumental measurement methods could obtain data trends that are consistent with sensory assessment methods; hence, they have the advantages of accuracy, convenience, and quantifiability. Conclusion:Thus, the instrumental measurement methods we verified can provide objective evidence for the efficacy of hair care products in repairing hair. K E Y W O R D Sex vivo test, friction factor of hair cuticle, gloss, hair repairing effect, mildly damaged hair INTRODUCTIONHair has always occupied a place in the history of humans who pursue beauty. Due to the influence of European and American cultures and Japanese and Korean trends, diverse hair colors are also popular. Asian hair is mostly brown; hence, to obtain more hair color, the first step is to recede the melanin in the hair. However, the current market uses oxidation to destroy the disulfide bond in hair proteins and change the characteristics of the hair surface to achieve fading. Destruction of theThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.