Carbon black N220 Pigment grade 20years manufacture experience high quality and best price ISO9001:2000 certificare We supply diverse model carbon black, for example N220, N330, N550, N660, N339, etc. 1. Type: n220 ,n330,n550.n660.2. Cas no:1333-86-43. Place of origin: china4. Standard: GB 3778-20035. Form: black granule or powder6.Process: wet or dry process7. Usage: maily applied to various ...