Designation:D5383−02(Reapproved2010)StandardPracticeforVisualDeterminationoftheLightfastnessofArtMaterialsbyArtTechnologists1ThisstandardisissuedunderthefixeddesignationD5383;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversamethodforexposingspecimensofcoloredartmaterialsindoorstosunlightcomingthroughaclosedwindow.AcardcontainingeightBlueWoolReferences2isexposedsimultaneously.BlueWoolReferences23,6,and7,areusedascontrolsindeterminingwhentoremovetestspecimensfromexposureandratethem.TestspecimensareratedbyassigningeachspecimenthenumberoftheBlueWoolReferencethatshowsthesameamountofcolorchange.1.2Thispracticemaybeusedtoindicateartmaterialsthatwillchangecolorwithinafewmonthsoryearsinnormalindoorexposureandthosethatwillremainunchangedforaperiodofyears.Itisnotrigorousenoughtoverifythatmaterialswillremainunchangedformorethanfiftyyearsinahomeorofficeenvironment.Amajorconsiderationindevel-opingthismethodwastokeepitsimpleandshortenoughtobepreformedwithoutinstrumentationinacomparativelyshortlengthoftime.1.3Thispracticeshallonlybeusedtoevaluatethelight-fastnessofartmaterialsnotconformingtoSpecificationsD4302,D5098orD5067andwhenitisnotfeasibletouseTestMethodsD4303.PracticeD5398,whichisasimplermethod,maybeusedbyartiststoevaluatethelightfastnessoftheirownmaterials.1.4Thispracticeisnotsuitableforevaluatingmaterialswithahighoilcontentsuchasartists’oil,resinoiloralkydpaints.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStanda...
