Threads are removed from rectangular strips of fabric, the straightened length of a portion of them is determined and their mass is determined either in equilibrium with the standard atmosphere for testing textiles (method A) or oven-dry plus the commercial allowance given in ISO 6741/4 (method B). Linear density is calculated from the mass and the sum of the straightened length.
ISO 7211-5:1984 history
2020ISO 7211-5:2020 Textiles — Methods for analysis of woven fabrics construction — Part 5: Determination of linear density of yarn removed from fabric
1984ISO 7211-5:1984 Textiles; Woven fabrics; Construction; Methods of analysis; Part 5 : Determination of linear density of yarn removed from fabric