African American Hair

This document summarizes research on the physical properties of African-American hair compared to Caucasian hair. It finds that African-American hair has a more irregular and elliptical shape than Caucasian hair. Studies measured the breaking stress, elongation, and diameter of wet and dry hair. African-American hair was found to have a lower breaking stress but higher yield stress than Caucasian hair. It also analyzed static charge and moisture content to further the understanding of differences between the two hair types.