Two-piece cans for fishery products are made by the draw and re-draw (DRD) process using aluminium or tinplate. While it is possible to have two-piece cans using both tinplate and aluminium (e.g., a tinplate body with an aluminium end), they have the disadvantage that bi metallic corrosion may occur if the two exposed surfaces come into contact. DRD cans are made from circular blanks of pre-lacquered plate which are first drawn into shallow cups and then re-drawn, once or twice depending on the cans final dimensions, causing an elongation of the wall and a simultaneous reduction of diameter. One great benefit of two-piece cans is that they have no side seam, and only one double seam, thus reducing the risks of leakage arising from imperfect seam formulation. Aluminium easy open two-piece cans enjoy great popularity where the convenience of the tear -off end is well suited to the dimensions of the product, however the functional benefits of the system have to be weighed against