Designation:D1765−18StandardClassificationSystemforCarbonBlacksUsedinRubberProducts1ThisstandardisissuedunderthefixeddesignationD1765;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisclassificationsystemcoverstheclassificationofrubber-gradecarbonblacksbytheuseofafour-characternomenclaturesystem.Thefirstcharactergivessomeindicationoftheinfluenceofthecarbonblackontherateofcureofatypicalrubbercompoundcontainingtheblack.Thesecondcharactergivesinformationontheaveragesurfaceareaofthecarbonblack.Thelasttwocharactersareassignedarbitrarily.1.2Allrubber-gradecarbonblacksforwhichanumberiscurrentlyassignedatthetimeofpublicationofthisclassifica-tionsystemarelistedinTable1togetherwithsomeoftheirtypicalproperties.ASTMclassificationnumbers(“N”or“S”designation)notlistedinTable1haveeitherbeenwithdrawnorarenotcurrentlyassigned.TheuseofinactiveorunassignedNorSdesignationsisprohibiteduntilsuchatimeasthedesignationisofficiallyreactivatedorassignedbySubcommit-teeD24.411.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1508TestMethodforCarbonBlack,PelletedFinesandAttrition...
