... . Pigment Black 6; C.I. Pigment Black 7; Carbon black; Acetylene black; lamp black; Carbonnanotubesmultiwalled; Fullerene carbon soot ( ... C --------------------------------------------------------------------------------------------2.Carbon black specification used in rubber GB3778-2003 ItemCarbon black N660Iodine Absorption ... requirement Excellent quanlity of carbon black n115,n121,n234,n326,n539 ...