Shanghai Yixin Chemical Co., Ltd. strictly selects the raw materials of barium carbonate-carbonate chemical. We constantly check and screen all incoming raw materials by implementing an Incoming Quality Control - IQC. We take varies measurements to check against collected data. Once failed, we will send the defective or substandard raw materials back to suppliers.. With the rapid globalization, delivering a competitive Yixin brand is essential. We are going global through maintaining brand consistency and enhancing our image. For example, we have established a positive brand reputation management system including search engine optimization, website marketing, and social media marketing.. To ensure that we meet the production goals of customers, our highly skilled service-oriented professionals will be available to help learn the details of products provided at Yixin Chemical. In addition to that, our dedicated service team will be sent for on-site technical support..