Designation:D6828−02(Reapproved2019)StandardTestMethodforStiffnessofFabricbyBlade/SlotProcedure1ThisstandardisissuedunderthefixeddesignationD6828;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthestiff-nessoffabricsbymeasuringtheforcerequiredtopushaspecimenintoaslotofpredeterminedwidthwithametalbladeworkingatapredeterminedcapacity.NOTE1—Forothermethodsfortestingstiffness,refertoTestMethodsD1388,D4032,andD5732.1.2ThistestmethodisapplicabletofabricsofanyfibercontentwhosestiffnessdoesnotexceedthecapacityofthePenetratorBeamapparatus.Specimenscanbetakenfromfabrics,rolls,orendproducts.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesafterSIunitsareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD1388TestMethodforStiffnessofFabricsD1776PracticeforConditioningandTestingTextilesD2904PracticeforInterlaboratoryTestingofaTextileTestMethodthatProducesNormallyDistributedData(With-drawn2008)3D2906PracticeforStatementsonPrecisionandBiasforTextiles(Withdrawn2008)3D4032TestMethodforStiffnessofFabricbytheCircularBendProcedureD4850TerminologyRelatingtoFabricsandFabricTestMethodsD5732TestMe...
