Cashmere has irregular thin and deep curl, which is composed of scale layer and cortex layer, without medulla layer. The scale density is about 60-70 pieces / mm, the fiber cross section is nearly round, and the diameter is thinner than that of fine wool. The average fineness is 14-16um, the fineness irregularity is small, about 20%, and the length is generally 35-45mm. The tensile length and moisture absorption of cashmere are better than that of sheep wool, which is fine, light and soft Smooth, waxy and warm. The fiber has moderate strength, elasticity and a natural and soft color. Cashmere is more sensitive to acid, alkali and heat than fine wool. Even at lower temperature and lower concentration of acid and alkali, the fiber damage is very significant, especially to chlorine containing oxidants.<br>
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