Warp Rib and Weft Rib Derivatives
topic
Warp rib weaves extend the plain weave interlacement over two or more weft threads simultaneously with the same warp end, creating raised ribs in the warp direction from the weft threads grouped under the extended floats, with 2x1, 2x2, and 3x3 rib designations indicating the warp-to-weft float ratio, while weft rib weaves create ridges in the weft direction by grouping warp ends that are raised together, producing the characteristic ribbed surface of bengaline, ottoman, and poplin fabrics.
Role
Produces the ribbed surface textures used in fashion fabrics, neckwear, and furnishing through the simple modification of grouping two or more threads to be treated as one in the interlacement repeat, with the visual prominence of rib formation determined by the ratio of thread grouping that creates the contrast between the raised rib surface and the depressed rib valley, and with rib fabric mechanical properties being anisotropic from the directional structure.