How do you make aluminum foil?

Aluminum foil is made through a process that starts with the extraction of aluminum from its ore, bauxite. The bauxite is refined to produce aluminum oxide, which is then reduced to aluminum using the Hall-H茅roult process. The aluminum is then melted and cast into large ingots. These ingots are heated and rolled into thin sheets using large industrial rolling mills. The aluminum is rolled multiple times, each pass reducing its thickness until it reaches the desired foil thickness. The final thin sheets are then cut and packaged as aluminum foil. This process requires precision and control to ensure the foil is uniform and free of defects.