There are various systems used to determine the numbers of weft and warp yarns that make up the woven fabrics. These systems vary from region to region, from country to country, in short by region. The reason for this is that the numbering systems are different according to the yarn types, properties and more importantly the raw materials used in each region. However, it is still possible to basically divide these numbering systems into two: according to the length and weight of the yarns.

In yarn numbering systems by length, the yarn length corresponding to a certain weight is taken as the basis. Cotton, wool, viscose, acrylic, staple fiber polyester or blended yarns, such as all short-staple yarns are used in this system. A certain length and number of threads are removed from the fabric. The length of the yarn is measured by opening the curls on a yarn. The stripped yarn is weighed on the precision balance and its weight is determined. The total undrawn yarn length is then divided by the total weight. This is the yarn count in Nm. This value is divided by 1.693 to determine the yarn count in Ne. Ne numbering system is used in our country.

Yarn numbering systems by weight are based on the yarn weight corresponding to a certain length. This system is used for numbering of polyester, licra, nylon and similar filament yarns.

For physical tests performed in accredited laboratories, standards issued by local and foreign organizations are complied with. In this context, when determining the yarn count (from yarn), the following standards are used:

• TS 244 EN ISO 2060 Textile - Yarns - Determination of linear density (mass per unit length) - Skein method
• Standard test method for linear density (yarn count) of yarn with ASTM D1907 line method

In addition, it is also important that laboratories have state-of-the-art equipment and equipment and have an experienced and trained staff to ensure fast, quality and reliable results.