Properties of aluminum foil

Aluminum foil, on the other hand, is made from thin sheets of the metal aluminum. They act as a total barrier that completely blocks out light and oxygen, making it bad for the storage of perishable goods. Despite this fact, many people use aluminum to wrap food leftovers since it is highly malleable and can be folded into easily packed sizes.

Aluminum sheets can be casted together to form aluminum foil bag, resulting in heavy duty bags that are great for the aseptic packaging of liquid products and long life foods. As a result, they can be several times more expensive than metallised films. Aluminum foil bags are also often seen with an interior coating of polyethylene that allows them to be heat sealed together.