Tinplate (commonly known as tinplate) is a surface coated with a thin layer of metal tin steel plate. The tin plate is the low carbon steel rolled into about 2mm thick steel plate, after pickling, cold rolling, electrolytic cleaning annealing, leveling, cutting processing, and then after cleaning, electroplating, soft melting, passivation treatment, oil coating shear into the tin plate finished products, the tin plate used for high purity tin (Sn> 99.8%). The tin layer can also be coated by hot dip plating method. The tin layer obtained by this method is thicker, the amount of tin is large, and there is no need for purification after tin plating