Designation:D519−04(Reapproved2013)StandardTestMethodforLengthofFiberinWoolTop1ThisstandardisissuedunderthefixeddesignationD519;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthemeasurementoftheaveragelengthandlengthdistributionoffibersinwooltop,onamass-biasedbasis.Themethodisapplicabletoalltypesoffibersinsliverformedfromlongparallelizedfibers.NOTE1—ThedeterminationoffiberlengthofwooliscoveredinTestMethodD1575,TestMethodforFiberLengthofWoolinScouredWoolandinCardSliver,thestaplelengthofgreasewooliscoveredinTestMethodD1234,TestMethodofSamplingandTestingStapleLengthofGreaseWool.NOTE2—ThistestmethodspecificallyrequireslengthininchesandmassinSIunitsandisnotcontrarytoASTMpolicy.TheSIunitsinparenthesesareprovidedforinformationonly.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD1234TestMethodofSamplingandTestingStapleLengthofGreaseWoolD1575TestMethodforFiberLengthofWoolinScouredWoolandinCardSliverD1776PracticeforConditioningandTestingTextilesD4845TerminologyRelatingtoWool3.Terminology3.1Definitions—FordefinitionoftextiletermsusedinthistestmethodrefertoTerminologyD4845.3.1.1Fordefinitionsofothertextiletermsusedinthistestmethod,refertoTerminologyD123.4.SummaryofTestMethod4.1Theweight(mass)offibers,indefinitelengthincrements,isdeterminedforeachspecimenorgroupofspecimensformingonesample.Fromthedataobtained,theweight-biasedaveragefiberlengthandtheweight-biaseddistributioniscalculated.Acumulativeweightaveragelengthfrequencycurvemaybeplotted.5.SignificanceandUse5.1Knowledgeof...
