Luoyang Zhengjie Science & Technology Industry Trade Co.,Ltd is established in 1999, has always been committed to the chrome oxide green series of refined research and production, to satisfy client's demand for higher quality products. Chrome oxide green series of refractory grade series, ceramic pigment grade series, abrasive grade series, fused grade series, special electrical grade series, high grade hard alloy series, etc. Through ISO9001:2008 quality management system certification, SGS, pr...