Designation:D3924−16StandardSpecificationforStandardEnvironmentforConditioningandTestingPaint,Varnish,Lacquer,andRelatedMaterials1ThisstandardisissuedunderthefixeddesignationD3924;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationdefinesthestandardatmospheresfornormalconditioningandtestingofpaint,varnish,lacquer,andrelatedmaterials,atapproximatelyambientconditions.NOTE1—SeeTerminologyE41,SpecificationE171andTestMethodE337.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.2.ReferencedDocuments2.1ASTMStandards:2E41TerminologyRelatingToConditioningE171PracticeforConditioningandTestingFlexibleBarrierPackagingE337TestMethodforMeasuringHumiditywithaPsy-chrometer(theMeasurementofWet-andDry-BulbTem-peratures)3.StandardAtmosphere3.1Unlessotherwisespecified,conditioningandtestingofcoatingmaterialsknowntobesensitivetovariationsintemperatureorrelativehumidityshallbecarriedoutinanatmospherehavingatemperatureof2362°C(73.563.5°F)andarelativehumidityof50610%.Ifclosertolerancesarerequired,61°C(62°F)orevennarrowerlimits,and65%relativehumiditymaybespecified.NOTE2—Thepositiveandnegativedeviationsfromthespecifiedsetpointsaremaximumallowedoperationalfluctuationsduringequilibriumconditions.Iftheoperationalfluctuationsarebeyondthestatedtolerances,discontinuetheconditioningortestingandcorrectthecauseofthetoleranceexceedancebeforecontinuing.3.2Thestandardroomorcabinetshallbewell-ventilatedbutfreeofdrafts,dust,productsofcombustion,andlaboratoryfumes.Lightingconditions,unlessotherwisespecified,shallbethatnormallymaintainedinaroomusedforpainttestpurposes.4.StandardTemperature4.1Unlessotherwisespecified,thestandardtesttempera-tures...
