ASTM_D_2494_-_13_2020.pdf

Designation:D249413(Reapproved 2020)Standard Test Method forCommercial Mass of a Shipment of Yarn or ManufacturedStaple Fiber or Tow1This standard is issued under the fixed designation D2494;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method provides a measurement of the com-mercial mass of a shipment of yarn or manufactured staplefiber or tow.This test method applies to(1)yarn of all fibertypes except silk,glass,asbestos,and bast;(2)tops and sliversof all fiber types except wool,silk,glass,asbestos,and bast;and(3)manufactured fibers or tow,except glass and otherfibers used for special purposes such as flock(Note 1).NOTE1For other test methods for measuring mass of fibrousmaterials,refer to Practice D2720.1.1.1 Sampling in this test method is primarily for use inacceptance testing rather than production control.manufac-tured fiber producers usually sample for the commercial“mass”of product on an on-going basis rather than eachshipment to a customer.1.2 Commercial mass has been traditionally based on one ofthree options depending on the state of the material:(1)dried,unscoured yarn,staple fiber,tow,and so forth,using commer-cial moisture regain in the calculations;(2)dried,scoured yarn,staple fiber,tow,and so forth,using commercial moistureregain values in the calculations;and(3)dried,scoured yarn,staple fiber,tow,and so forth,using a defined allowance in thecalculations.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD629 Test Methods for Quantitative Analysis of TextilesD1909 Standard Tables of Commercial Moisture Regainsand Commercial Allowances for Textile FibersD2257 Test Method for Extractable Matter in TextilesD2258 Practice for Sampling Yarn for TestingD2720 Practice for Calculation of Commercial Weight andYield of Scoured Wool,Top,and Noil for Various Com-mercial CompositionsD3333 Practice for Sampling Manufactured Staple Fibers,Sliver,or Tow for TestingD3888 Terminology for Yarn Spinning SystemsD3990 Terminology Relating to Fabric DefectsD4849 Terminology Related to Yarns and Fibers2.2 AATCC Standard:150 Dimensional Changes in Automatic Home Launderingof Woven Garments33.Terminology3.1 Definitions:3.1.1 commercial mass,nbilled mass(weight)as deter-mined by a generally accepted method or as agreed uponbetween the purchaser and the seller.3.1.1.1 DiscussionThe basis for determining the commer-cial mass of a shipment of yarn or manufactured fibers isgenerally one of the following:(1)CAS Basis(commercial allowance with scouredmaterial)the mass of oven-dry fiber or yarn after scouring bydefinite prescribed methods plus the mass corresponding to itscommercial allowance.1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.58 on Yarns and Fibers.Current edition approved Feb.1,2020.Published March 2020.Originallypublished as D2494 66 T.Last previous edition approved in 2013 as D2494 13.DOI:10.1520/D2494-13R20.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from the American Association of Textile Chemists and Colorists,P.O.Box 12215,Research Triangle Park,NC 27709.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.(2)CMRS Basis(commercial moisture regain with scouredmaterial)the mass of oven-dry fiber or yarn after scouring bydefinite prescribed methods plus the mass corresponding to itscommercial moisture regain.(3)CMRU Basis(commercial moisture regain wi