The way the yarn of the fabric count is expressed is the unit that expresses the thickness of the fiber or yarn. It is expressed by the length per unit weight of fibers or yarns at given moisture regain. Home Textile Fabrics Manufacturers introduce different calculation unit systems, usually divided into metric counts and imperial counts.
①Metric count. The length (m) of a fiber or yarn weighing 1 gram at given moisture regain. The finer the fiber or yarn, the higher the metric count. The thickness of hemp fiber and wool yarn, wool-type chemical fiber pure spinning, blended yarn, silk spinning yarn, and ramie yarn are expressed in the metric count. The metric count of a strand is expressed by dividing the nominal count of the single yarns that make up the strand by the number of strands.
②Imperial count. The nominal moisture regain is 0.4536 kg of yarn with the number of twists in length (768 meters per twist of cotton yarn). The finer the yarn, the higher the inch count. Due to the inconvenience of calculation, this representation method is used in fewer and fewer countries. The imperial count of strands is expressed in the same way as the metric count.
In addition to the above two representation methods, tex and denier are also widely used internationally. Tex (Tex) is abbreviated as special, also known as the number, which is expressed by the weight (grams) of 1000 meters of fiber or yarn at predetermined moisture regain.