Designation:D6587−12(Reapproved2018)StandardTestMethodforYarnNumberUsingAutomaticTester1ThisstandardisissuedunderthefixeddesignationD6587;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthemeasurementofyarnnumberoffilamentandspunyarnsusingautomatedtesters.Someoftheinstrumentsarestand-aloneandothersareoptionalmodulesforinstrumentsthatperformadditionaltests.1.1.1Theinstrumentsarecapableofmeasuringyarnnum-bersupto4000dtex(3600denier).NOTE1—Fordeterminationofyarnnumberbyuseofreelandbalance,refertoTestMethodD1907.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD1776PracticeforConditioningandTestingTextilesD1907TestMethodforLinearDensityofYarn(YarnNum-ber)bytheSkeinMethodD2258PracticeforSamplingYarnforTestingD4849TerminologyRelatedtoYarnsandFibers3.Terminology3.1ForallterminologyrelatingtoD13.58,YarnsandFibers,refertoTerminologyD4849.3.1.1Thefollowingtermsarerelevanttothisstandard:cottoncount,denier,lineardensity,tex,yarnnumber,yarnnumberingsystem.3.2Forallothertextiletermsusedinthistestmethod,seeTerminologyD123.4.SummaryofTestMethod4.1Aspecifiedlengthofyarn(specimen)isautomaticallystrippeddirectlyfromthepackage,cut,andweighe...
