|
KMID : 0381920080380030251
|
|
Korean Journal of Microscopy
2008 Volume.38 No. 3 p.251 ~ p.257
|
|
|
Study on the Tensile Strength of Bleached Hair
|
|
Lee Gui-Young
Chang Byung-Soo
|
|
|
Abstract
|
|
|
|
Human hair experience tensile forces during combing, bleaching and permanent dyeing processes. We have used rheometer to characterize bleached hair tensile response. Also, we investigated to morphological changes after tensile test of virgin hair and bleached hair using scanning electron microscopy. In tensile test, the tensile strength of virgin hair was 14.66 g/cm2. They were measured as 12.95 g/cm2, 12.61 g/cm2 and 11.43 g/cm2 for after the first, the second and the third trials of bleaching were done, respectively. Virgin hair had a higher tensile force than bleached hair. Tensile strength got lowered as more bleaching trials were done. In the observation of scanning electron microscopy, the fracture and lift-off of the cuticle outer layer were shown in virgin hair and bleached hair. The bleached hair were more lifted off at the outer cuticle layer than virgin hair. Consequently, chemical damage of bleaching agent caused weakening of the outer cuticle in the hair.
|
|
|
KEYWORD
|
|
|
Bleached hair, Cuticle, Rheometer, Scanning electron microscopy, Tensile strength
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
|