Acid Copper Brightener For base layer of Button, Zipper, Buckle ... g/L100-110 g/Lchloride ion (by filling with Hydrochloric Acid, every 0.1 ml/L HCl equal to 36 ... water to the water level, slowly put in concentrated sulfuric acid, stirring the solution with force due to it releases great ... perate make it best-seller in domestic market. 510 Acid Copper Brightener For base layer of Button, Zipper, Buckle