A one-page encyclopedia entry on mercerized cotton, covering John Mercer's 1844 discovery that caustic soda or potash alters cotton fibre, and the later finding that treating cloth under tension prevents shrinkage and gives a silky lustre. It explains the change in fibre structure and mentions machines for mercerizing yarn in hanks or cloth. The page opens with the end of the preceding entry (Mercerization), which cites German and English references.