Combing
Also searched as: combed cotton, combed wool, noil
Removing shorter fibers and aligning longer fibers before some spinning processes.
In detail
Combing selects and prepares a fiber population after earlier opening and carding. It removes shorter fibers and helps arrange the retained fibers for subsequent yarn production. In wool processing it also removes neps and residual vegetable matter. The shorter material removed during wool combing is called noil and may enter other textile routes.
The science and numbers
A comber works on a fringe of fibers held in a nipper. Rotating needles comb the free end, then the combed tuft is drawn forward through a stationary top comb that holds back short fibers, neps and trash, and each new tuft is pieced onto the previously combed web. The rejected material is noil. Combing therefore changes the length distribution rather than individual fibers: in cotton, HVI measures bundle upper half mean length and uniformity, and studies report that length, strength and uniformity rise together while short fiber content falls, so removing the short tail makes yarn more even. Evidence from waste-fiber yarns shows the reverse effect: blending in shorter fibers raises mass irregularity, imperfections and hairiness. Removing more noil improves evenness at the cost of yield, the same trade-off that governs flax hackling.
A practical example
A combed cotton shirt and a carded cotton shirt can share the same fiber composition but use different yarn preparation. Compare their surface, construction and washing behavior rather than assuming that the extra processing step determines every aspect of quality.
What to distinguish
Combing is not the same as shearing or dehairing. It primarily prepares textile fibers for spinning; dehairing separates the coarse and fine components of certain animal coats.
Origins and history
Combing and hackling share one idea: drawing a fiber mass through pins so that fibers too short to be held are left behind. For flax this was long hand work with hackles, and the Irish Linen Centre and Lisburn Museum holds hackling pins dated to about 1850. In wool, combing defines the worsted route: sliver is gilled and combed, the noil removed and the result formed into top, whereas the woollen route omits combing. In cotton, combing remained an optional step reserved for finer, smoother yarns.
Related terms
Sources & further reading
- CottonWorks: Combing
- Woolmark: Worsted top-making
- Theoretical and Applied Genetics: Genome-wide association study of fiber quality traits in US upland cotton (2024)
- Waste Management and Research: Quality assessment of upcycled waste/cotton blend rotor yarn (2026)
- Irish Linen Centre and Lisburn Museum: Hackling pins for combing flax, c.1850
- Woolmark: Wool processing
Technical references reviewed 2026-09-22. Examples are illustrative. Industry organizations and manufacturers describe their own fields; their references are not independent product endorsements. Figures are approximate and depend on the stated test conditions.