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The derivatives of plain weave are classified into warp rib and weft rib. Warp rib and weft rib can be classified into regular rib and irregular rib further. The structure of regular rib differs from the structure of irregular rib.

Characteristics of warp rib:
1.Warp rib can produce ribs or cords in the weft direction.
2.The quality of warp yarn is higher than weft yarn.
3.The number of ends is higher than picks in a unit space. דעמאָלט, yarn having same count may be used.
4.Two or more weft yarns pass over or under a warp.
5.Weft yarns are low twisted yarn.
6.The design uses two heald shafts.
7.Mercerized yarns are used.
8.Warp rib is mainly used in warp faced construction, such as Poplin fabric.

In the regular warp rib, the number of warp yarn is the same in each line while the number of warp yarn is not the same in the irregular warp rib. פֿאַר אַז, the structure creates the floating characteristics on the fabric so that fabrics are more comfortable than the basic plain weave cloth.