Example ,Denim fabric (3/1) made it twill weave. Feature of Twill Weave: The main feature of twill weave are mention bellow:-Diagonal line can be seen on the faced of the fabric. Twill line may be from lower lift to upper right(Z-twill) or from lower right to upper lift(S-twill) corner.
Now, the flannel that your grandfather wore was made from either carded wool or worsted yarn, but modern versions can be made from wool, cotton, or even synthetic fiber. But regardless of the fiber, the fabric is then napped or brushed to give it that level of softness that we all like. What happens during brushing is that a fine metal brush gently rubs the fabric to raise fine fibres from the loosely spun yarns, this creates what we call a nap.
The cotton duck fabric shown on the left is tightly woven using a plain weave method like a basketweave...over...under...over...under. This creates a very durable fabric with a smooth surface. However, the cotton twill fabric shown on the right, is woven in a series of parallel diagonal ribs.
The black twill that I received is more suitable to making a pair of pants. Truly, it would suit that need. The navy, much too light. My beef is that both fabrics had the same description as being 35 percent cotton/65 percent polyester and are suitable for bottom weight fabric, but they are not the same weight.
Twill is a type of textile weave with a pattern of diagonal parallel ribs. This is done by passing the weft thread over one or more warp threads then under two or more warp threads and so on, with a "step," or offset, between rows to create the characteristic diagonal pattern. Because of this structure, twill generally drapes well.
A twill weave cotton fabric made with different colored yarns in the warp and the weft. Due to the twill construction, one color predominates on the fabric surface. Suitable for pants, jackets and skirts. Pre-wash and dry 100% cotton denim at least twice to eliminate shrinkage and color bleeding.