Tinplate also call dry plate, in recent years, as the tinplate cans is widely used to the outer packing of teas, cookies, moon cakes etc. The dosage of which is increasing & the prices is rising. At present, the domestic demand for all kinds of tinplate cans is about 700 billion every year, and a considerable number of raw materials dependence on import. However, after the huge amount ,the most materials & the luxury packing, the recovery is still behind less than 30%. Most of these metal tins is in idle or discarding , and being indicated for a serious waste by environmentalists after only go through a short .