Designation:D3265−15aStandardTestMethodforCarbonBlack—TintStrength1ThisstandardisissuedunderthefixeddesignationD3265;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthetintstrengthofcarbonblackrelativetoanindustrytintreferenceblack(ITRB).1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1799PracticeforCarbonBlack—SamplingPackagedShipmentsD1900PracticeforCarbonBlack—SamplingBulkShip-mentsD4483PracticeforEvaluatingPrecisionforTestMethodStandardsintheRubberandCarbonBlackManufacturingIndustriesD4821GuideforCarbonBlack—ValidationofTestMethodPrecisionandBias3.SummaryofTestMethod3.1Acarbonblacksampleismixedwithawhitepowder(zincoxide)andaliquidvehicle(soybeanoilepoxide)toproduceablackorgraypaste.Thispasteisthenspreadtoproduceasurfacesuitableformeasuringthereflectanceofthemixturebymeansofaphoto-electricreflectancemeter.ThereflectanceofthetestedsampleisthencomparedtothereflectanceoftheITRBpreparedinthesamemanner.ThetintstrengthofthetestedsampleisexpressedasunitsofthereflectanceoftheITRBdividedbythereflectanceofthesampleandmultipliedby100,whencalibrationandstandard-izationinSection8isperformedwiththeoriginalITRBormultipliedby101.34whenITRB2isusedinthecalibrationandstandardizationstep.4.SignificanceandUse4.1Forthebroadrangeofcommercialrubbergradecarbonblacks,tintstrengthishighlydependentuponparticlesize.Tintstrengthcanbeusedasanindicationofparticlesize;however,tintstrengthisalsodependent...
