Designation:D1251–94StandardTestMethodforWaterVaporPermeabilityofPackagesbyCycleMethod1ThisstandardisissuedunderthefixeddesignationD1251;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthewatervaporpermeabilityoffinishedpackagessubjectedtoextremesoftemperatureandrelativehumiditywhenclosedandsealedintheconventionalmanner.Itisintendedfor“shelf-sizepack-ages”thatareshippedinoutsidecontainers.1.2Thistestmethodmaybeappliedtothepackageaspacked,afteroneormoreperformancetestssuchasdrop(TestMethodD5276),drum(TestMethodD782),vibration(TestMethodD999),afteraseriesoftestssimulatingtheshippingenvironment(PracticeD4169),oraftershippingtestshavebeencompleted,asrequired.1.3Packageswithbodywallshavingthepropertyofab-sorbingwaterarenotsuitablefortestingunderthistestmethod.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.2.ReferencedDocuments2.1ASTMStandards:D782TestMethodsforShippingContainersinRevolvingHexagonalDrum2D895TestMethodforWaterVaporPermeabilityofPack-agesUnderConstantConditions2D996TerminologyofPackagingandDistributionEnviron-ments2D999TestMethodsforVibrationTestingofShippingContainers2D4169PracticeforPerformanceTestingofShippingCon-tainersandSystems2D5276TestMethodforDropTestofLoadedContainersbyFreeFall23.Terminology3.1Definitions—Generaltermsforpackaginganddistribu-tionenvironmentsarefoundinTerminologyD996.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1cycle—oneseriesoftestatmospherestowhichthetestspecimensareexposed.3.2....
