Hebei Province Wuyi County Huafeng Photographic Materials Co., Ltd.is the professional production base of photographic materials as well as the earliest manufacturer of EDTA series products in China. The technology ability is strong, production artistic is advanced, the supervision method is completed and the products quality is great. At present, it mainly produces EDTA, DTPA PDTA ammonium thiosulfate four series and 20 kinds of products. The products can be widely used in textile, paper-making, water treatment, photosensitive and other industries. The prod...