Twill fabric is a cotton fabric with two-up-one-down twill and 45° left slant. The twill pattern is obvious on the front, but not so obvious on the back of the variegated twill. The warp and weft yarn counts are similar, with the warp density slightly higher than the weft density, and the feel is softer than khaki. It is divided into coarse twill and fine twill. Coarse twill uses cotton yarn above No. 32 (below 18 s) as warp and weft yarns; fine twill uses cotton yarn below No. 18 (above 32 s) as warp and weft yarns. Twill comes in natural white, bleached and variegated colors, and is often used as lining for uniforms, sportswear, sports shoes, emery cloth base and padding. Wide-width bleached twill can be used as a bed sheet, and can also be used as a bed sheet after printing. The original color and variegated fine twill have a bright surface after electro-optical or calendering, and can be used as umbrella cover and clothing lining.
Plain weave is woven one up and one down, twill is woven two up and one down or three up and one down. The front and back of plain weave are the same, while the front and back of twill are different. The front side is slanted to the left or right, and the back side has no slant. If the yarn count and density are the same, the plain weave is tight and thick, while the twill structure is relatively loose. As for the use and pattern design, the twill front warp yarn is generally long and floating, with good gloss and soft feel, and is mostly used in clothing and bedding.
