Laiwu Chengjia Chemical Co., Ltd. was founded in 1986 and is located in Laiwu Industrial Park of Laiwu City. Our company is one of the biggest carbon black and zinc oxide manufacturers in East China and has three factories: a zinc oxide plant, a titanium dioxide plant and a carbon black plant.it has obtained ISO9001:2000 international quality management system certification. We not only have established a complete quality assurance system, but also have integrated research, development and production and sale.