Lisa Chen, one of stuff from Rech Chemical Co. Ltd samples department, often need to pack bag samples which are sented to customers at home and abroad. As the she pack more samples, it’s inevitable to be stained by ferrous sulphate monohydrate on clothing or shoes. Being infected with ferrous sulfate, clothes often appears yellow stains. Whatever how Lisa washed the stains, they cannot be cleared up. Lisa how to do? [Read More]