Shanxi Jin-Jin Chemical Co., Ltd. (www.jhfhj.com) was founded in 1988, is the only Chinese steel blackening agent research and production enterprise, we always adhere to the principle of innovation, is the leader in the field of domestic blackening agent. Our company main products are steel blackening agent, environmental blackening agent, efficient preservatives. The company has always insisted on the quality of the text, to think from the customer's perspective, constantly seeking innovation and development. To become a world-class enterprises struggle blackening agent.