Fiber fineness, which is the raw material of the yarn, is an inherited characteristic. Fiber fineness is different according to the source from which the fiber is obtained. In long-staple species, the diameter of the fibers is thinner than in short-staple species. For example, in Indian cotton, fiber fineness is 21,5 microns. Fine fibers are firm, soft and shiny. As such, fabrics woven from these fibers are also thin, elegant and robust. Thick fibers are generally obtained with low numbered yarns. If the diameter of a fiber of a certain length is less than 18 microns, the 20 number increases for each micron. Conversely, if the 18 is greater than microns, the yarn count decreases with each micron increment.

The fineness of the yarn is related to how many fibers are present in the yarn section to be obtained. In a yarn cross-section, at least 30 fibers must be present for the yarn to form. However, the number of fibers in the cross-section is generally above 100. The fact that 100 fibers in the cross-section, ie the number of fibers 100, is the limit value for almost all spinning methods.

The number of fibers in the yarn is an important factor in the following situations: yarn spinning limit, yarn strength, yarn twist, uneven yarn, appearance of yarn, drape of the woven fabric, sheen, hairiness, handle, dyeing speed of yarn, yarn defects, yield and quality.

The microner value of the yarn indicates the number of fibers in the cross section and whether it can be spun at a certain number. If the microner values ​​are low, this is also indicative of immature fibers. Depending on the yarn count and fiber fineness, the limit values ​​for the number of fibers in the cross-section were determined.

In fine yarn production, the number of fibers entering the cross section is high. Therefore, the strength of the yarn increases and less breakage occurs.

Fiber count analysis of yarns is also performed in accredited laboratories. The standard used in these studies is as follows:

• EKOTESK 10