4、rsareassignedarbitrarily.1.2Allrubber-gradecarbonblacksforwhichanumberiscurrentlyassignedatthetimeofpublicationofthisclassificationsystemarelistedinTable1togetherwithsomeoftheirtypicalproperties.ASTMclassificationnumbers(“N” or “S” designation)notlistedinTable1haveeitherbe