There must be at least three warp yarns and three weft yarns interlaced in one complete tissue, and only one weft tissue point on each warp weft yarn. The interlaced points of the warp and weft are in the form of a diagonal line of the fabric on the surface of the fabric.
Twill weave is generally expressed in fractions. Among them, the numerator represents the number of organized points of a warp or weft in a complete tissue, and the denominator represents the number of latitude and longitude points of a warp or weft in a complete tissue. The sum of the numerator and the denominator represents the number of latitude and longitude lines of a complete organization, referred to as the number of pieces.
The twill weave has three types of warp twill, which are mostly composed of tissue points, and the weft twill, which has the same number of weft and twill weaves. The oblique direction of the twill has a right oblique (↗) and a left oblique (↖).
The warp and weft interlacing of the twill weave is less than that of the plain weave, so the plain weave fabric is not strong, but the twill fabric is soft and smooth.