Designation:D904−99(Reapproved2013)StandardPracticeforExposureofAdhesiveSpecimenstoArtificialLight1ThisstandardisissuedunderthefixeddesignationD904;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthebasicprinciplesandoperatingproceduresforultraviolet(UV)lightaging(withorwithoutwater)ofadhesivebondedjointshavingatleastoneglassortransparentadherend,usingfluorescentUV(seeMethodA)orxenon-arclightsources(seeMethodB).1.2Thispracticeislimitedtotheapparatusforobtaining,measuring,andcontrollingtheagingconditions,andtotheproceduresforexposure.Samplepreparation,strength,testconditions,andevaluationoftheresultsaredescribedinotherASTMtestmethodsorspecifications.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D907TerminologyofAdhesivesG151PracticeforExposingNonmetallicMaterialsinAccel-eratedTestDevicesthatUseLaboratoryLightSourcesG154PracticeforOperatingFluorescentUltraviolet(UV)LampApparatusforExposureofNonmetallicMaterialsG155PracticeforOperatingXenonArcLightApparatusforExposureofNon-MetallicMaterials3.Terminology3.1Definitions—ManyofthetermsinthispracticearedefinedinTerminologyD907.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1irradiance,n—(1)therateatwhichlightenergyfallsonaunitareaofsurface(W/m2),or(2)theradiantpowerincidentuponaunitareaofsurface.3.2.2radiantexposure(orlightdosage),n—(1)theaccu-mulatedlightenergywhichhasfallenonaunitareaovertime(J/m2),or(2)theirradianceintegratedwithrespecttotime.3.2.3...
