ASTMDI543ôb0757530002220b7W,d-O9-pSDesignation:D1543-864NbAMERICANSOCIETYFORTESTINGANDMATERIALS1916RaceSt..Philadelphia,Pa.19103ReprintedfromtheAnnualBookofASTMStandards,CopflightASTMIfnotlistedinthe.currentcombinedindex,willappearinthenextedition.StandardTestMethodforCOLORPERMANENCEOFWHITEARCHITECTURALENAMELS'ThisstandardisissuedunderthefixeddesignationD1543;tlienumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrehion,theyearoflastrevision.Anumberinparenthesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddescribesalaboratoryprocedureforevaluatio'gthecolorpermanenceofwhitearchitecturalenamels.1.2Tfiìsstandardmayinvolvehazardorisma-terials.operations,andeqtiipinetit.Thisstandarddoesnotpirrporttoaddressallofthesafityprob-lemsassociatedwithitsirse.Itistheresponsibil-ityoftheuserqfthisstandardtoestablishappro-priatesafryandhealiìipracticesanddeterminetheapplicabilìtyofregdatorylittiirationspriortoirse.2.ReferencedDocument2.1ASTMStandard:D2224MethodforCalculationofColorDifferencesfromInstrumentallyMeasuredColorCoordinates'3.SummaryofMethod3.1Panelscoatedwiththetestenamelsareexposedinthedarktoanatmosphereofdrysulfurdioxide(SO,)for24li.Colormeasure-mentsbeforeandafterexposurearemadetodeterminethecolorchange.4.SignificanceandUse4.1Interiorwhiteenamelschangecolorfre-quentlyinuse.Thistestmethoddescribesaprocedureinwhichenamelsareexposedtoasyntheticatmospherethathasbeenfoundtocausecolorchangesapproximatelyequaltothosecausedbyhomeatmospheres.5.Apparatus5.1TheapparatusforcausingacceleratedcolorchangeshallbeassembledasshowninFig.1andshallconsistofthefollowingcomponents:5.1.1GlassBottles,three8-oz(250-mL)ca-pacity,withaminimuminsidediameterof2in.(50mm).5.1.2SpecitnenRack,corrosion-resistantthatfitsintothetestchambertoholdtestpanelssuspendedfromcorrosion-resistanfhooksspacedontheracksothatthepanelsdonottoucheachotherorthecontainer.5.I.3TestChamber,g...
