... black N220.330.550.660 Introduction: Our company maufactures the black canton series or superior-wear resistance(N200),resistance( ... used for black dye,Used in the manufacture of ink,printing ink,paint,plastic ,and as rubber reinforcing agent We ... and dry powder.The 100% of our products are surperior grade products. We export to America, European Union and South-Eastern Asia, ect. the best quality ...