On July 18, the price of a carbon black factory in Zaozhuang, Shandong Province was stable. The price of wet-process N220 was 8300 yuan/ton, the price of wet-process N330 was 7200 yuan/ton, the price of wet-process N550 was 7900 yuan/ton, the price of wet-process N660 was 7200 yuan/ton, and the price of wet-process N326 was 7400 yuan/ton. A carbon black factory in Zaozhuang has 2 carbon black production lines with an annual output of 20,000 tons, which is produced on orders from old customers.