Pure aluminum foil. For example, aluminum foils for lithium ion batteries are very pure aluminum foils. As for the thickness, less than 0.1mm is generally called Aluminium foil. Now the thinnest aluminum foil can be below 0.01mm.

At present, the production of film products is the most important process of film rolling. Rolling is the process by which the rolled product is pulled between rotating rolls and is compressed and plastic deformed by the interaction between the roll and the rolled product. The billet is divided into DC and CC materials. Recently, a new HTMM manufacturing process, continuous casting rolling (hazellet manufacturing process), has become mature as an alternative way to produce aluminum foil billets.