① Determination of the total processing rate The total processing rate refers to the total deformation degree of the foil after recrystallization annealing to rolling out the finished product. Generally speaking, the total processing rate of 1 series can reach more than 99%, and some 8 series products can also reach this value, but the total processing rate of aluminum alloy foil is generally below 90%.
② Determination of the pass processing rate The determination of the pass processing rate is the core of the rolling process. The pass processing rate of pure aluminum series products can reach 65%. The first pass after the billet is annealed should not be too large. The processing rate is generally about 50%.