Black hair (African-American hair) is different from Caucasoid hair or Asian hair. The most typical character of the black hair is that it is strong and rigid transversally but is very flexible length wise. Because of this presentation, the hair body often curls tightly and takes up a spiral appearance. The shape of African hair has a resemblance to a twisted oval or ribbon.Another feature of black hair is that it is irregular in diameter. Neither the fiber diameter nor the cuticle diameter is the same all through its length. Because of this typical structure and coiling structure the hair. Watch video in link below
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many fragile points. The outside of a tight curl puts stress on the outer hair fiber cortex and cuticle. At some points outside the curls, cuticle becomes very thin and flakes easily. These areas of stress in the hair fiber are prone to damage by chemicals. Even vigorous combing is enough to flake the cuticle and damage the hair.Another undesirable feature of the black hair is its low moisture content. This character also makes the black hair more susceptible to weathering. Since the black hair is too curly in nature, it is difficult to comb. It is prone to hair breakage and hair shedding.