aluminium foil Thin but strong, eye-catching because of its silvery glitter, aluminium foil is an everyday presence in our lives. Its unique insulating properties make aluminium foil ideal packaging for just about anything.
Aluminium foil is nothing more than aluminium alloy sheets that are between 0.004 and 0.24 mm thick. Aluminium foil is 8 times thinner than a banknote and yet it provides perfect protection against light, liquid and bacteria. It is thanks to these properties the shelf life for many type of groceries packaged in materials that include aluminium foil often exceeds 12 months.
Foil is made on rolling mills in a process that involves pulling a sheet of aluminium between two rotating rollers under pressure. The resulting extra thin sheets or [of?] foil is then cut up into rolls using special cutters. The material used most often in the production of foil is pure primary aluminium or 1xxx, 3xxx and 8xxxx series alloys that include iron, silicon, manganese and occasionally copper if greater strength is needed. Heated aluminium is rolled into sheets between 2 and 100 mm thick (hot rolling). These are then cold-rolled into foil of the required thickness.