Optimal thread regularity
Evenness of a fibre flow – Sliver, roving and yarn
Article REF: N4607 V1
Optimal thread regularity
Evenness of a fibre flow – Sliver, roving and yarn

Authors : Olivier DEMANGEAT, Marie-Ange BUENO

Publication date: December 10, 2025 | Lire en français

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5. Optimal thread regularity

5.1 Definition and expression of regularity

The regularity of a yarn is characterized by the coefficient of variation of its count. The spinnability limit of a yarn is commonly characterized by the theoretical limit coefficient of variation of the count. CVTL .

The Martindale formula (for details, see

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