Two sets of thread or yarn
which make up a piece of woven fabric
. During the weaving
process the warp threads are stretched from the back to the front of the loom
. The weft threads are inserted across the loom at right angles to the warp; the weft threads going under and over the warp threads. Traditionally, the weft is held in a shuttle and one weft thread is inserted at a time, which limits the speed, but in some looms the weft is inserted in continuous waves across the loom.
Fabrics made by machine knitting
can be weft-knitted or warp-knitted.
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