Slub (textiles)

A slub in textiles production refers to thickened areas of a fiber or yarn.

They are also produced when short, staple fibers are spun into a single yarn.

Slubs may be valued or deliberately produced for aesthetic effect, but they may also be regarded as a defect caused by either uneven spinning or using low-grade, lumpy or short-staple fiber.

These shorter fibers, known as silk noil, may also be used unspun (for instance, as wadding in a quilted garment), but are often plied into threads (which are then at least twice as thick as the filament) and used in the production of slubbed silks.

Slubbed silks include: Slubby mixed-fiber fabric include: Synthetic fibers can readily be produced in filament form, as very long lengths of consistent diameter, but it is sometimes slubbed for effect.