Designation:D3813/D3813M−98(Reapproved2020)StandardTestMethodforCurling,Twisting,andTubingonUnwindofPressure-SensitiveTapes1ThisstandardisissuedunderthefixeddesignationD3813/D3813M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodprovidesoneprocedurefordetermin-ingtheextentofcurling,thedegreeoftwisting,andtendencytoformatuberesultingfromunwindingofthetapefromitsroll.1.2ThevaluesstatedineitherSIorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemmustbeusedindependently,withoutcombiningvaluesinanyway.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D996TerminologyofPackagingandDistributionEnviron-mentsD3715/D3715MPracticeforQualityAssuranceofPressure-SensitiveTapesD4332PracticeforConditioningContainers,Packages,orPackagingComponentsforTestingE122PracticeforCalculatingSampleSizetoEstimate,WithSpecifiedPrecision,theAverageforaCharacteristicofaLotorProcess3.Terminology3.1Definitions—GeneraltermsusedinthistestmethodaredefinedinTerminologyD996.4.SummaryofTestMethod4.1Thesamplerolloftapeisplacedonafree-turningspindleaspecifieddistanceaboveahorizontalplane.Astripoftapeisdrawnfro...
