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Hair melanin content and photodamage

Santos Nogueira, A.C.; Joekes, I.és.

Journal of Cosmetic Science 58(4): 385-391

2007

ISSN/ISBN: 1525-7886
PMID: 17728939
Document Number: 606024
The aim of this study was to compare the susceptibility of hair with different melanin content (virgin white, blond and dark-brown) to photodegradation, evaluating changes on hair color and mechanical properties. Light exposure was carried out with a mercury-vapor lamp for up to 1800h. It was observed that color changes are different for each hair type and dependent on the wavelength range. Breaking elongation and breaking strength were affected in all hair types, mainly by UVB radiation. Results show that the melanin type and content of each hair is not the only parameter related to hair damages caused by sun exposure.

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