... N220.N330.N550,N660 3.Plastic,rubber industry 4.Hight quality and .Good price Carbon black N220.330.550.660 carbon black n330 ... resistance(N200),resistance(N300),quick-press(N500),and common(N600) of dry process and wet process maily applied to various rubber ... in the manufacture of ink,printing ink,paint,plastic ,and as rubber reinforcing agent. High quality and Best market price for carbon black