Cotton: fibre, yarn and fabric

Cotton begins as a plant fibre that grows from the seed within the boll of Gossypium. Textile labels use “cotton” for that fibre; the term does not name one fabric construction. A cotton shirt, denim and a fine woven lining may share the fibre while differing in yarn, weave and finishing.^[1,2,3]

Cotton fibres are almost pure cellulose. Under a microscope, each has a cuticle, layered cell walls and a central lumen; the Canadian Conservation Institute gives a typical fibre length of 1–6 centimetres. Variety and growing conditions influence the raw fibre. Mercerization changes its shape and can increase lustre, dyeability and strength, so labels such as “mercerized cotton” describe an additional treatment.^[2]

After harvest, cotton fibres are still attached to the seeds. Ginning separates the lint from the seed and removes residual plant material. Opening, cleaning and carding then turn loose fibres into a sliver; drawing combines several slivers and aligns the fibres further. The route diverges before spinning: ring spinning uses roving, while rotor and air-jet systems can feed from sliver. Each forms yarn in a different way, so the named fibre alone does not describe the yarn’s construction.^[4,5,6]

Cotton’s familiar qualities are not guarantees for every item. It absorbs moisture; new cotton is stronger when wet, though aged cotton may behave differently. Cotton cloth can crease, shrink or yellow, and some bleaching or dyeing treatments may weaken it. A fibre-composition label distinguishes cotton from blends, but does not tell you how the yarn, fabric or finish was made. Follow the garment’s specific care instructions; historic or fragile textiles need advice based on their condition.^[1,2,3,7]

The Prato Textile Museum sets local production within a much wider textile story. Its collections include samples from historic companies in the area, textile machinery and contemporary fabric archives that trace change from 1976. This is a useful setting for understanding how fibres become designed materials within Italy’s textile districts.^[8]

A cotton boll is not a shirt waiting to be cut. Fibre grows around the seeds; ginning separates seed and lint, preparation makes a workable fibre mass, and spinning turns that mass into yarn before knitting or weaving. The same fibre name can therefore appear on very different fabrics. A diagram should show each state separately, rather than jumping from a white boll to a finished Italian textile.^[2,4]