ASTM_D_6321_-_D_6321M_-_14.pdf

Designation:D6321/D6321M14Standard Practice forthe Evaluation of Machine Washable T-Shirts1This standard is issued under the fixed designation D6321/D6321M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers test methods and procedures usedto evaluate important characteristics of machine washableT-shirts.T-shirts may be made of knitted fabric composed ofany textile fiber(s)or blend of fibers and intended to be used asunderwear or as an outer garment.1.2 T-shirts characteristics may be assessed either as a finalproduct or at any intermediate processing stage.1.3 This practice excludes T-shirts intended for hand wash-ing or dry cleaning care.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.5 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 standards to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD1776 Practice for Conditioning and Testing TextilesD3786 Test Method for Bursting Strength of TextileFabricsDiaphragm Bursting Strength Tester MethodD3787 Test Method for Bursting Strength of TextilesConstant-Rate-of-Traverse(CRT)Ball Burst TestD3887 Specification for Tolerances for Knitted FabricsD3940 Test Method for Bursting Strength(Load)and Elon-gation of Sewn Seams of Knit or Woven Stretch TextileFabrics(Withdrawn 1995)3D4154 Performance Specification for Mens and BoysKnit-ted and Woven Beachwear and Sports Shirt FabricsD4156 Performance Specification for Womens and GirlsKnitted Sportswear FabricsD7022 Terminology Relating to Apparel2.2 AATCC Test Methods:4Evaluation Procedure 1,Gray Scale for Color ChangeEvaluation Procedure 2,Gray Scale for StainingEvaluation Procedure 7,Instrumental Assessment of theChange in Color of a Textile SpecimenMethod 107,Colorfastness to WaterMethod 150,Dimensional Changes of Garments after HomeLaunderingMethod 172,Colorfastness to Powered Non-ChlorineBleach in Home LaunderingMethod 179,Skewness Change in Fabric and Garment TwistResulting from Automatic Home Laundering2.3 Other Documents:A Glossary of AATCC Standard Terminology4Standardization of Home Laundry Test Conditions43.Terminology3.1 For all terminology relating to D13.61,Apparel,refer toTerminology D7022.3.1.1 The following terms are relevant to this standard:T-shirt.3.1.2 For definitions of other textile terms used in thisstandard,refer to terminology in Terminology D123 andGlossary of AATCC Standard Terminology.4.Significance and Use4.1 This practice may be used to evaluate pertinent charac-teristics of washable T-shirts.4.2 T-shirts may be subject to extra processes such asgarment dyeing,garment washing,printing,application ofembroidery or trims.An individual process or combination orprocesses may affect the performance of the final product.1This practice is under the jurisdiction of ASTM Committee D13 on Textiles,and is the direct responsibility of Subcommittee D13.61 on Apparel.Current edition approved Feb.1,2014.Published March 2014.Originallyapproved in 1998.Last previous edition approved in 2013 as D6321 13.DOI:10.1520/D6321_D6321M-14.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from AATCC,PO Box 12215,Research Triangle Park,NC 27709.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.3 This practice may be used by mutual agreement betweenthe purchaser and the supplier to establish purchasing specifi-cations.5.Sampling,Selection,and Number of Specimens5.1 Lot SampleTake a lot sample as directed in anapplicable material specification or as agreed between pur-chaser and supplier,such as an agreement to take at randomsome fixed number of shipping containers or garments fromeach lot.5.2 Laboratory SampleFrom each lot sampling unit,takefive T-shirts to be used as the laboratory sample.5.3 Test SpecimenFrom each laboratory sample,twoT-shirts are to be tested as-received and two T-shirts that are tobe laundered.The fifth T-shirt is to be retained as a controlspecimen and not tested.6.Fabric Performance Characteris