Hair resistance to mechanical wear

Hair mechanical properties are primary indicators of hair integrity. Here we describe a methodology based on hair's resistance to wear evaluate cosmetic treatments. Using vibrational vortex cycle, developed protocol that relies the plastic deformation and degradation hair, due frictional forces between hardened steel balls fragments. We demonstrate when in contact with fragments promoted extended degradation. The degree was related wear. Lower rates reflect high found differences according ethnicity type treatment. This shows great potential for screening evaluation effect treatments hair.