Knitting is divided into weft knitting and warp knitting.
Warp knitting uses multiple yarns to form loops along the longitudinal (warp) direction of the fabric surface at the same time.
Weft knitting is done by looping one or more yarns in a transverse (weft) order along the sector.
Weft knitted fabrics can be formed with at least one yarn, but in order to improve production efficiency, many yarns are usually used for knitting; while warp knitted fabrics can not be formed with one yarn, one yarn can only form a crisp fabric composed of one coil.
All weft-knitted fabrics can be separated into threads in reverse direction, but warp-knitted fabrics can not.
Weft-knitted fabrics can be knitted by hand. A yarn can be picked up into coils one by one with a bar needle and inserted into the corresponding coils in the upper row. Warp knitted fabrics cannot be knitted by hand.