A new approach to the bending properties of hair fibers
Baltenneck, F.; Franbourg, A.; Leroy, F.; Mandon, M.; Vayssié, C.
Journal of Cosmetic Science 52(6): 355-368
2001
ISSN/ISBN: 1525-7886 PMID: 11773953 Document Number: 537537
A new test developed to characterize the bending properties of treated or virgin hair fibers is described. The device consists of a pendulum that bends a sample made up of 39 parallel hair fibers at each swinging stroke. Hair bending stiffness can be assessed by the number of strokes observed until the pendulum stops. The mechanical behavior of natural hair fibers is related to their geometric characteristics. The effects of various hair treatments can be assessed by this method.