Designation:D7867−13(Reapproved2020)StandardTestMethodsforMeasurementoftheRotationalViscosityofPaints,InksandRelatedLiquidMaterialsasaFunctionofTemperature1ThisstandardisissuedunderthefixeddesignationD7867;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodscovertheuseofrotationalviscom-eterstodeterminethedependenceofapparentviscosityofpaints,inksandrelatedliquidmaterialsontemperature.Thefirstmethodusesastandardrotationalviscometerwithcon-centriccylindergeometryrunningatafixedrotationalspeedasthetemperatureisincreasedordecreased.Thesecondmethodusesarotationalviscometerwithconeandplategeometryrunningatafixedrotationalspeedasthetemperatureisincreasedordecreased.Thethirdmethodusesconcentriccylinderorcone/plategeometryoperatedwithashearraterampatseveraldiscretetemperatures.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandardmayinvolvehazardousmaterials,opera-tionsandequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafety,health,andenvironmentalpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D3925PracticeforSamplingLiquidPaintsandRelatedPigmentedCoatings3.Terminology3.1Definitions:3.1.1apparentviscosity,n—viscositythatisnotatruepropertyofthefluid,butavariabledependingontheshearrate.3.1.2shearthinningfluid—fluidinwhichtheap...
