... n220 n330 n550 n660 1.black powder or granular 2.for tyre industry 3.BV,SGS,CIQ,ISO,COA,MSDS 4.Free ... sample manufacture of carbon black N330 for tyre industry1.black powder or granular 2.for rubber industry 3.BV,SGS,CIQ,ISO ... the tyres collapse, flowers, split. manufacture of carbon black N330 for tyre industry