ASTM D1423
ASTM D1423 – Standard Test Method for Twist in Yarns by Direct-Counting Description: Significance and Use 5.1 Test Method D1423 for testing twist in yarns by direct-counting is considered satisfactory for acceptance testing of commercial shipments because current estimates of between-laboratory precision are acceptable and the method has been used extensively in the trade for acceptance testing. 5.1.1 If …