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KMID : 0381920090390010049
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Korean Journal of Microscopy
2009 Volume.39 No. 1 p.49 ~ p.56
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Study on the Morphological Change of Straight Permanent Waved Hair by Tensile Strength Test
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Roh Jung-Ae
Choe Tae-Boo
Chang Byung-Soo
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Abstract
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In this study, we investigated tensile properties and ultrastructural changes of straight permed hair using the rheometer and the scanning electron microscopy. First, we compared the morphological characteristic between the virgin hair and the straight permed hair after testing tensile strength. Cuticle cells were heavily lifted off in straight permed hair than in the virgin hair. Cuticle cells were separated by the destruction of intercellular membrane complex and no destruction or damage were found in cytoplasm. In the comparative test for tensile characteristic between the virgin hair and the straight permed hair, tensile distance of the straight permed hair was decreased by 24.5% or 3.05 mm than the virgin hair. The tensile strength was decreased by 34.63% or 5.62 g/cm2 and the maximum stress by 34.59% or 56.12 g. As a result, the tensile property dropped to the lowest level with the straight permed hair than with the bleached hair or the permanent dyed hair of previous studies.
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KEYWORD
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Straight permed hair, Tensile strength, Rheometer, Scanning electron microscopy
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