Lots of food items-packaging components and shiny plastic novelties are made of paper or plastic using an evaporated coating of bright aluminum. The “silver” helium balloons that we see at birthday events are made of a tricky plastic known as Mylar, coated with a thin, evaporated coating of aluminum steel. https://codyiicuj.blogtov.com/16850880/a-secret-weapon-for-aluminium-sliding-door