wefttråder

Weft threads, or wefttråder, are the yarns that run horizontally across a fabric and are interlaced with the warp yarns that run lengthwise. They, together with the warp, form the fabric’s structure. In most woven textiles the weaving sequence alternates between warp and weft in a repeating pattern, producing plain weave, twill, satin, and other structures.

Weft yarns can be made from cotton, wool, silk, linen, or synthetic fibers, or blends. The thickness, twist, and fiber content of the weft, as well as its color, affect the fabric’s hand, drape, strength, and appearance. In patterned fabrics, changes in weft color or material create stripes, plaids, or textured effects.

During weaving, a shed is created by lifting certain warp threads; the weft is then transported across the shed by a shuttle or, in modern equipment, by a rapier, air-jet, or water-jet. The reed packs the weft into place after insertion, building up the fabric row by row. The overall pattern reflects both warp structure and weft choices.

Weft threads are fundamental to most woven textiles, from lightweight fabrics to heavy garments and upholstery. Some fabrics emphasize the weft surface, known as weft-faced weaves, while others emphasize the warp. The choice of weft material and technique influences texture, color fastness, and durability.