Direct Numbering
The universal decimal system for describing yarn density represents the weight in grams of a standardized length of yarn. Textile engineers implement tex count as a direct measurement scale where higher numbers indicate heavier and thicker yarns. This system is defined as the mass in grams of one thousand metres of yarn.
It replaces many regional and fiber-specific scales with a single, unified metric for all textile types.
Scale Advantages
Scale advantages are rooted in its direct, linear relationship with yarn diameter, which simplifies calculations for fabric weight and loom settings. In contrast to indirect systems like cotton count, a higher value here corresponds directly to a thicker yarn. This makes it much easier for product developers to calculate the exact amount of raw material required for a specific weave.
It also simplifies the conversion of measurements across different yarn types like spun cotton, filament silk, or textured polyester.
Unit Calculations
Unit calculations involve weighing a measured sample, typically a one-hundred-metre skein, and multiplying the result by ten. For finer yarns, sub-units like decitex, which represents the weight of ten thousand metres of yarn, are commonly used in the synthetic filament industry. For coarse yarns like ropes or heavy sewing threads, the kilotex unit is applied instead.
This flexibility allows the system to accommodate everything from microfiber stockings to heavy industrial carpets.
Global Sourcing
Global sourcing relies on this standard to ensure consistent material specifications across international supply chains. Many global apparel brands write their technical specifications exclusively in this decimal system to avoid the confusion of converting between cotton, wool, and linen counts. It has become the standard language of international textile trade.