September 2015 in “The European physical journal. E, Soft matter and biological physics/The European physical journal. E, Soft matter” Longer time setting curls overnight leads to better curl retention.
Human hair can almost fully recover its structure within about 1,000 minutes after being stretched.
41 citations
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June 2018 in “Nutrition and healthy aging” Skin aging is largely due to differences in stiffness and elasticity between skin layers, leading to wrinkles.
July 2023 in “Research Square (Research Square)” Skin's uneven surface and hair follicles affect its stress and strain but don't change its overall strength, and help prevent the skin from peeling apart.
19 citations
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July 2018 in “ACS biomaterials science & engineering” Bleaching and combing damage hair's surface and mechanical properties.