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    Development of a Stiffness-Angle Law for Simplifying the Measurement of Human Hair Stiffness

    In Keun Jung, S. C. Park, Y. R. Lee … B. M. Kim
    Studysummary In this study, researchers developed a method called the Stiffness-Angle Law and found that hair treated with caffeine-infused shampoo showed a 13.2% increase in stiffness, as measured by their novel evaluation technique.
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    Research cited in this study 2

    1. The Analysis of Scalp Irritation by Coacervates Produced in Hair Shampoo via FTIR with Focal Plane Array Detector, X-ray Photoelectron Microscopy and HaCaT Cells International Journal of Cosmetic Science · 2016
    2. Keratins and Lipids in Ethnic Hair International Journal of Cosmetic Science · 2013

    Related research 2

    1. Mechanisms of Impairment in Hair and Scalp Induced by Hair Dyeing and Perming and Potential Interventions Frontiers in medicine · 2023
    2. Hair Care Practices and Structural Evaluation of Scalp and Hair Shaft Parameters in African American and Caucasian Women Journal of cosmetic dermatology · 2015