The titration of yarns is based on the knowledge of two quantities: la LENGTH (L) and the WEIGHT (P).
By relating these two quantities we have values called:
– Securities (T) in the method of direct titration
– Numbers (N) in the method of indirect titration.
The DIRECT METHOD, said to fixed length and variable weight, is given by the ratio of weight divided
the length (T=P/L). This method is commonly used for all yarns made from fibers
continuous (silk, rayon, nylon, etc.).
The title Tex (Tex) indicates the weight in grams of 1000 meters of yarn. For example, Tex 1 means that
1000 meters weigh 1 gram.
This titration method is called universal and should replace all titrations, especially
of the indirect system (N).
The title Decitex (Dtex) indicates the weight in grams of 10,000 meters of yarn or yarn. This method
it is used for burrs or multi-strand yarns. For example, Dtex 1 means 10,000 meters weighs
1 gram (drool).
The title Denari (Den) indicates the weight in grams of 9000 meters of yarn or yarn. It is used for burrs, yarns
multiburr and for silk. For example, Den 1 means that 9,000 meters weighs 1 gram (drool).
With the direct method, the figure indicating the count is higher the thicker the yarn (or the
burr), the fineness being expressed as a function of the variable weight compared to a fixed length.