Designation:D7724−11StandardTestMethodforCarbonBlack—Non-DispersibleMatterbyMechanicalFlushing(NDM)1ThisstandardisissuedunderthefixeddesignationD7724;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofnon-dispersiblematteraftermechanicalwaterflushingofregularuntreatedcarbonblacks.Itmaynotbeapplicabletooil-treatedcarbonblacksbecausetheoilwouldpreventproperwettingoftheblackbywater.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1799PracticeforCarbonBlack—SamplingPackagedShipmentsD1900PracticeforCarbonBlack—SamplingBulkShip-mentsD4483PracticeforEvaluatingPrecisionforTestMethodStandardsintheRubberandCarbonBlackManufacturingIndustriesE11SpecificationforWovenWireTestSieveClothandTestSieves3.SummaryofTestMethod3.1Asampleofcarbonblackismechanicallyflushedwithwaterthroughawire-meshscreenofaspecifiedsizeuntilallthatremainsisanon-dispersiblematterofcarbonblack.Thenon-dispersiblematterisdried,weighed,andtheamountofresidueisexpressedasmg/kg(ppm)oftheoriginalsample.4.SignificanceandUse4.1Thequantityofnon-dispersiblematterofcarbonblackisimportantinsomemoldedorextrudedproductsasitmayrelatetothesurfaceappearanceofthoseproducts.Themaxi-mumamountofnondispersiblematterandtheminimumsizeoftheparticlestobeanalyzedineachapplicationisnormallydeterminedandagreedtobetweentheuserandtheproducer.5.Apparatus5.1SieveApparatus,asshowninFig.1.35.2Balance,withasensitivityof0.01g.5.3AnalyticalBalance,withasensitiv...
