Swallow chemicals was the import and export department of "Hunan Jewel Group". "Jewel group" has set up 3 plants for producing lithopone and zinc products. All the factories have passed the ISO certificate.©Hunan Xiangtan Factory was founded in 1995 with strong growth in recent years. Capacity: Lithopone: 15000MT/YEAR Barium sulfate: 30000MT/YEAR Advantages of lithopone: High Whiteness High Tinting Strength Strong Hiding Powder ISO and SGS certificate © Hunan Hengyang Factory was founded in 2002. It is one of the biggest zinc sulfate exporting enterprise in china.The products is mainly used in feed, fertilizer and mineral processing. Capacity: Zinc sulfate monohydrate: 30000MT/YEAR Zinc sulfate heptahydrate: 30000MT/YEAR Advantages of zinc sulfate: steady quality high zinc content low heavy metals © Jiangxi Jiujiang Factory was founded in 2007. It is one of the biggest manufacturer of active zinc oxide for applications in catalyst and feed industry in china. Capacity: Zinc oxide: 15000MT/YEAR Zinc carbonate:12000MT/YEAR Zinc sulfate heptahydrate(battery grade): 8000MT/YEAR Advantages of zinc products: Environment-friendly: Heavy metal content is much lower. Steady quality: Guarantee by specific technique and strict quality management. R&D: Strong research and development capability can meet customer's particular requirement.