Is aluminum foil pure aluminum?
Once exposed to air, aluminum will be oxidized into alumina which is the protecting surface of aluminum.
Not really, aluminum foil can be devided into pure aluminum foil and aluminum alloy foil.
No, it is aluminum alloy. it is a kind of composite material. Aluminum foil is a kind of thermoprinting material made by calendaring aluminum into sheet. Since its thermoprinting effect is similar to that of silver foil, it is also called fake silver foil. As aluminum is soft and ductile with silvery luster, aluminum foil sheet can be made by mounting calendered aluminum sheet on the offset paper with sodium silicate, which can be used to print. But the color of aluminum foil will gradually become dark as it is easy to be oxidized and it fade due to friction and touching, so it is not applicable to the thermoprint of book covers for permanent preservation. No, because packaging bags made by aluminum, rubber and plastic containPE POV POF which can’t be resolved by soil.
