What are the classifications of twill fabrics?

There are two types of twill: coarse twill and fine twill. Cotton yarns above No. 32 (below 18 ne) are used as warp and weft for coarse twill; cotton yarns below No. 18 (above 32 ne) are used as warp and weft for fine twill. Twill has white, bleached and variegated types, and is often used as lining for uniforms, sportswear, sports shoes, emery cloth base and padding. Wide bleached twill can be used as bed sheets, and can also be used as bed sheets after printing. The surface of the original color and variegated fine twill is bright after electro-optical or calendering, and can be used as umbrella cover and clothing lining.