Effects of Semi-Permanent Hair Dyes and Conditioning Polymers on the Color Enhancing Properties of Shampoo Formulations

    Gabriela Daniels, Zara Fazil, Ioanna Mitropoulou, Slobodanka Tamburić
    Studysummary This study concluded that adding polymeric conditioning actives to shampoos improved color retention in permanently dyed hair, while additional cationic dyes at certain pH levels weakly dyed the hair directly.
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