Definition
"Tex" is a weight-based system used to determine the linear density of a yarn. It is internationally standardized. Dtex is one-tenth of the tex value and allows finer gradations to be expressed. The unit indicates the weight in grams per 10,000 m of yarn. It is calculated as follows: tex = weight in grams x 10,000 / length in meters.
Use in the textile industry
Dtex is used in the textile industry primarily to designate man-made fibers and synthetic yarns, because this unit allows finer gradations than tex and is therefore better suited to the low linear densities of modern filament yarns. Dtex is widely used as a yarn fineness designation especially in the production of technical textiles, microfiber fabrics, and knitted fabrics. The unit allows a direct comparison of yarns made from different fiber materials and by different production processes.
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