Designation:D4039−09(Reapproved2015)StandardTestMethodforReflectionHazeofHigh-GlossSurfaces1ThisstandardisissuedunderthefixeddesignationD4039;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddescribesaprocedureforusingtwospecularglossmeasurementstoobtainahazeindexforhigh-glossnonmetallicspecimens(1-4).2Itisparticularlyusefulforevaluatingthehazeinclearfinishesonnonglossysubstrates,andthehazeinreflectedimagesproducedbythesurfacesofopaqueglossypigmentedfinishes.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3D523TestMethodforSpecularGlossD823PracticesforProducingFilmsofUniformThicknessofPaint,Varnish,andRelatedProductsonTestPanelsD3964PracticeforSelectionofCoatingSpecimensforAppearanceMeasurementsE284TerminologyofAppearanceE430TestMethodsforMeasurementofGlossofHigh-GlossSurfacesbyAbridgedGoniophotometry3.Terminology3.1Definitions:3.1.1speculargloss,n—ratiooffluxreflectedinspeculardirectiontoincidentfluxforaspecifiedangleofincidenceandsourceandreceptorangularapertures.3.1.2haze,n—inreflection—scatteringoflightattheglossysurfaceofaspecimenresponsiblefortheapparentreductionofcontrastofobjectsviewedbyreflectionatthesurface.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.160°specularglossG60,n—specularglossmeasuredwiththe60°geometryspecifiedinTestMethodD523.3.2.220°specularglossG20,n—specularglossmeasuredwiththe20°geometryspecifiedinTestMethodD523.3.2.3hazeindex,H,n—ameasureofreflectionhaze,whereH=G60−G20.3.3AppearancetermsusedinthisstandardaredefinedinTerminologyE284.4.SummaryofTestMethod4.1Measurement...
