A generic name for a light-weight, open fabric of plain or simple leno weave traditionally with a cover factor of 5- 10 in the warp and 5-9 in the weft. Normally, muslins did not exceed 2 oz/yd2 (68 g.m-2)). Some of these fabrics are used in the grey state (butter muslin and cheese cloth), whereas others (dress muslins) are bleached and dyed.
Textile Resource (http://www.textile.org.uk)