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1.1 This test method covers the measurement of yarn number up to 4000 dtex (3600 denier) and related variability properties of filament and spun yarns using an automated tester with capability for measuring mass variability characteristics.
1.2 Yarn number variability properties include percent density spread (%DS), coefficient of variation (%CV), density frequency variation.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are in parentheses. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in inaccuracies of results.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D123 Terminology Relating to Textiles
D1425 Test Method for Unevenness of Textile Strands Using Capacitance Testing Equipment
D1776 Practice for Conditioning and Testing Textiles
D1907 Test Method for Linear Density of Yarn (Yarn Number) by the Skein Method
D2258 Practice for Sampling Yarn for Testing
D4849 Terminology Related to Yarns and Fibers
ICS Number Code 59.080.20 (Yarns)
UNSPSC Code 11151700(Yarns)
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ASTM D6612-00(2011), Standard Test Method for Yarn Number and Yarn Number Variability Using Automated Tester, ASTM International, West Conshohocken, PA, 2011, www.astm.orgBack to Top