Annealing is always a big issue. No company will reveal their schedules, every aluminium foil manufacturing company has their own annealing schedules for various thickness’s and applicable for their furnaces. But if the perfect annealing schedule is used then it will result in good quality foil, no stickiness or wettability problems (residue left on the foil and leaving it almost impossible to use in combination with water based ink or glue), high tensile and yield strength and good elongation.