The yarn count density is the thickness of the yarn, and its expression methods are S, D, N, Tex, Dtex, etc. Specific fabrics use specific specifications, among which S and D are more commonly used. In the scientific literature, tex is generally converted.
S is the imperial count. It refers to a yarn weighing one pound at a given moisture regain. Its length is 840 yards, which is called a few counts of yarn. Generally, the yarn count of staple fiber is represented by S, and staple fiber is represented as Spun in English. The thicker the yarn, the smaller the S value; the thinner the yarn, the larger the S value. For example, the yarn count of 40S is thinner than 20S.
D is the abbreviation of Denier (Daniel). It is a method of expressing the fineness of chemical fiber. It refers to the weight in grams of a 9000-meter-long silk at a given moisture regain. Generally, the number of filaments is represented by D, and the filament is represented by Filament in English. The larger the D, the thicker the yarn, for example, 75D is thicker than 50D
Tex, also known as "number", referred to as special, formerly known as public branch. It refers to the weight of a 1000-meter-long yarn in grams at a given moisture regain.
The metric count of Nm refers to the multiple of the length of 1 gram of yarn under a given moisture regain. That is to say, 1 gram of heavy yarn is exactly one meter long and 1 (male) count yarn, and 1 gram of heavy yarn length is It is 200 meters long and the yarn fineness is 200. The metric count is also a fixed weight system, so the larger the count, the finer the yarn.