Designation:D1331−14StandardTestMethodsforSurfaceandInterfacialTensionofSolutionsofPaints,Solvents,SolutionsofSurface-ActiveAgents,andRelatedMaterials1ThisstandardisissuedunderthefixeddesignationD1331;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodscoverthedeterminationofsurfacetensionandinterfacialtensionofavarietyofliquidmaterials,includingbutnotrestrictedtopaints,solvents,andsolutionsofsurface-activeagents,asdefinedinTerminologyD459.Fourmethodsarecoveredasfollows:MethodA—SurfaceTensionbyduNoüyring.MethodB—InterfacialTensionbyduNoüyring.MethodC—SurfaceTensionbyWilhelmyplate.MethodD—InterfacialTensionbyWilhelmyplate.1.2MethodAoriginallywaswrittenprimarilytocoveraqueoussolutionsofsurface-activeagents,butisalsoappli-cabletoaqueouspaints,nonaqueoussolutions(includingpaints)andmixedsolventsolutions.1.3MethodBisapplicabletotwo-phasesolutions.Morethanonesolutecomponentmaybepresent,includingsolutecomponentsthatarenotinthemselvessurface-active.1.4MethodCisapplicabletosurfaceactiveliquidsand,unlikeduNoüyring,nobuoyancycorrectionsareneededandresultsarenotaffectedbymoderateviscosities(1-10Pa-sec)oftheliquid.Itistherecommendedmethodforusewithpaintsandresinsolutions.1.5MethodDisapplicabletotwo-phasesolutionsandmixtures.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.MaterialSafetyDataSheetsareavailableforreagentsandmaterials.Reviewthemforhazardspriortousage.2.ReferencedDocuments2.1ASTMStandards:2D459TerminologyRelatingtoSoapsandOtherDetergents3...
