... 3.ISO9001:2000 Manufacturer 4.SGS for quality and quantity Carbon black N330Size CMS-185CMS-200CMS-220 Nitrogen quantity (Nm3/h.t ... .6~0.8N2/Air (%)> 36> 36> 42 Carbon black We mainly manufacture and export carbon black N220,N330,N550,N660,N326,N774 ect.We ... to America, European Union and South-Eastern Asia, ect. Modern carbon black products are direct descendants of early "lamp blacks" first produced ...