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# What are counts and what do yarn counts represent

Yarn count refers to the thickness of the yarn, which can be expressed by S, D, Nm, Tex, Dtex, etc. S, D more commonly used. Because the system of units is different, it is usually divided into metric system and British system.

S is the number of inches, or Ne, which is the number of yarns that weigh a pound at a constant rate of return of moisture. Spun yarn is represented by S in general and Spun in English as Spun. The thicker the yarn, the smaller the S value; The finer the yarn, the larger the S value, for example, the yarn count of 40S is thinner than that of 20S.

D, short for Denier, is a measure of the fineness of a chemical fibre. It refers to the weight of a 9,000-metre filament in grams at a constant moisture recovery rate. The number of Filament is expressed as D, and Filament is expressed as Filament in English. The bigger D is, the thicker the yarn is. For example, 75D is thicker than 50D.

Tex, also known as "number", formerly known as public branch. It refers to the grams of weight of 1000 meters of yarn at constant moisture recovery rate.

Nm count refers to the meter multiple of the length of 1g yarn at the common moisture recovery rate. In other words, 1g yarn is 1 (male) yarn exactly one meter long, 1g yarn is 200 meters long, and the yarn fineness is 200.

The metric count is also fixed weight, so the larger the count, the finer the yarn. Dtex, is the number of grams of fiber bundles 10,000 meters long.

The following are the conversion formulas of several units:

D=5315/S, D=9000/N, Tex=D/9, 1Tex=1/10Dtex, Tex=100/N, Dtex=10D/9, Dtex=1000/N

The larger the number of yarns, the higher the quality requirements of raw materials.