Designation:D3924−80(Reapproved2011)StandardSpecificationforStandardEnvironmentforConditioningandTestingPaint,Varnish,Lacquer,andRelatedMaterials1ThisstandardisissuedunderthefixeddesignationD3924;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.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)andarelativehumidityof5065%.Ifclosertolerancesarerequired,61°C(62°F)orevennarrowerlimits,and62%relativehumiditymaybespecified.3.2Thestandardroomorcabinetshallbewell-ventilatedbutfreeofdrafts,dust,productsofcombustion,andlaboratoryfumes.Lightingconditions,unlessotherwisespecified,shallbethatnormallymaintainedinaroomusedforpainttestpurposes.4.StandardTemperature4.1Unlessotherwisespecified,thestandardtesttempera-tureshallbeasspecifiedinSection3.5.RoomTemperature5.1Atemperatureintherangefrom18to29.5°C(65to85°F)shallbecalledroomtemperature.6.ConditioningandTesting6.1Unlessotherwisespecifiedinthetestmethod,conditiontheorganiccoatingmaterialsordriedtestfilmsthereofandthetestequipmentfor...
