Evaluation of the Performance of Cosmetic Products on Reduction of Porosity by Measurement of the Diffusion of Red 80 Dye Solution.

Author: Angela Cristina Vargas Calle*; Ana Raquel Zeferino; Nathana Cindy Barros Silva Ramos; Alzira Xavier Pinto Dini; Wanderson Anderberg de Lima; Adriano Pinheiro.

Published at: October 01, 2024

https://kosmoscience.com/pdf/evaluation-of-the-performance-of-cosmetic-products-on-reduction-of-porosity-by-measurement-of-the-diffusion-of-red-80-dye-solution.pdf

Abstract Hair is a complex polymer that can absorb liquids and small particles through its structure. A complex net of interconnected microvoids formed mainly in the amorphous domain of the polymer. Different types of damage such as chemical treatments, thermal treatments, and others can degrade the amorphous phase increasing the amount of free space. The study of the reduction migration of liquids and small particles is the high interest to the cosmetic industry as the amount of microvoids is related to the hair’s mechanical properties. In this study, we presented a methodology to study the effect of cosmetic products on porosity reduction. Indian Hair bleached twice, were treated with commercial cosmetic treatments (3 swatches per treatment) and then, the swatches were held in a straight position with the tip immersed in an aqueous solution of dye red 80 for 30min. After this time, the distance traveled by the dye was measured. All the treatments presented a lower distance of dye permeation in comparison to the control group. Among the products, the one that promises to repair disulfide bonds presents the highest reduction. The statistical analysis shows that the methodology was reproducible, was able to differentiate treatments, and this differentiation was maintained on the 2 experimental days. Keywords: Hair Permeation, Hair Porosity, Hair Evaluation, Hair Integrity.