Dear sir: we export carbon black used for rubber painting and plastic products .The total capacity of the company is more than 50,000 tons per year. Our product has passed the quality tests conducted by China National Testing Center.And at the same time ,we also had passed the ISO9001 certification with high running efficiency and stable product quality.Our products are sold to over 50 countries. Main grades we offered are N220,N330,N550,N660.. **contact**: Jackie Chu( business manager)[...]