Designation:D2252−05(Reapproved2009)StandardSpecificationforFinenessofTypesofAlpaca1ThisstandardisissuedunderthefixeddesignationD2252;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationisapplicableintheclassificationofalpacaintotypesaccordingtofineness.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD2130TestMethodforDiameterofWoolandOtherAnimalFibersbyMicroprojectionD4845TerminologyRelatingtoWool3.Terminology3.1Fordefinitionsoftextiletermsusedinthisspecification:alpaca,averagefiberdiameter,fineness,refertoTerminologyD4845.3.2Fordefinitionsofothertextiletermsusedinthisspecification,refertoTerminologyD123.4.SignificanceandUse4.1Thisspecificationforfinenessisintendedasaguideforproduction,preparation,andmarketing(Note1)bycomparingtheaveragefiberdiameterofameasuredspecimenwiththefinenessspecificationsforthevarioustypeslistedinTable1.ThestandarddeviationwhichexpressesmeasuredvariabilityofaspecimenmaybecomparedwiththeaverageshowninTableX2.1.NOTE1—TestMethodD2130doesnotincludeanyvaluesfortheprecisiontobeexpectedinthetestingofalpacafibers.Inaninterlabora-torytestinwhichsixlaboratorieseachmadeonetestoneachofsixtypesamples,HTB-CB,HAXB-CB,HAAB-CB,HAB-CB,HLPB-CL,andHSKB-CL,thecoefficientofvariationoftheaveragefiberdiametersbetweenlaboratories,includingtestvariation,was3.2,4.7,3.8,4.5,2.2,and0.93%forther...
