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Mercerised, Gassed and Regular Cotton Yarn Compared

26 July 2026 by

Cotton yarn can be finished to add lustre and smoothness. Here is how the main treatments compare.

Regular cotton

Untreated combed or carded cotton — the everyday standard for most knits and wovens. See cotton yarn.

Gassed (singed) yarn

The yarn is passed through a flame to burn off protruding fibres, giving a cleaner, smoother, less hairy surface — valued for fine, crisp fabric.

Mercerised yarn

Treated under tension with caustic soda, mercerisation adds a silky lustre, increases strength and improves dye uptake for richer shades — premium for lustrous knits and fine wovens.

Choosing a finish

Regular for everyday value, gassed for a cleaner surface, mercerised for lustre and vivid colour. We can advise and source the finish your fabric needs.

Want a lustrous, mercerised or gassed cotton? We will source it to spec.

Combed cotton  ·  Request a quote

More in our yarn guides.

S-Twist vs Z-Twist: Why Yarn Twist Direction Matters
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