Nainsook
Soft, lightweight, plain-woven cotton fabric
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Nainsook is a soft, fine, lightweight form of muslin.[1][2] Muslin encompasses a broad range of fabrics of varying weight and fineness, but is always a plain weave, cotton fabric. The English word 'nainsook', documented from 1790 onwards,[3] derives from the Hindi word nainsukh, which literally means "eye's delight".[1]
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Nainsook was often used to make babies' clothing or lingerie at least until the 1920s.[4] Nainsook cotton was also often used to make bias tape in the 1950s and 1960s.