1.1 This practice covers the use of the tex system to designate the linear density (number, or count) of fibers and of yarns made from any type of fiber or combination of fibers. It is also applicable to other textile materials, including yarn intermediates (slivers, rovings, tops, etc.), single or plied yarns, cords, and threads. Note 1The mass per unit length concept of linear density is applicable to any material which has a high ratio of length to cross section.1.2 Conversio