Tex Linear Density

Measurement Procedure

To determine this value, a technician uses a wrap reel to wind a precise length of yarn, typically one hundred meters, under controlled tension. This yarn skein is then weighed on a highly accurate digital balance to the nearest milligram. Multiplying this weight by ten gives the value in tex, which represents the mass of one thousand meters.

This direct measurement system is much simpler than indirect systems like cotton count, where a higher number indicates a finer yarn. This direct system is used across all fibre types.

Fabric Design

Weaving and knitting mills rely on these values to calculate the amount of yarn required to produce a specific fabric weight and construction. High density yarns are used to weave heavy canvas and denim, while low density yarns are selected for lightweight shirts and underwear. This measurement ensures consistency across separate yarn shipments.

Measurement Boundary

The measurement must be performed on yarn that has been pre-conditioned in a standard atmosphere to eliminate the influence of moisture. Damp yarn will yield an artificially high value, making the test results invalid.