Because people in the market have been foolishly calling foil packaging products tinfoil or tin foil containers. So I have to correct this misunderstanding again. I want to justify the name of the safest and greenest foil packaging.
First, tin is the fourth most precious metal after platinum, gold, and silver. Pure tin is shiny, non-toxic and not easy to oxidize and discolor. It has good sterilization, purification and preservation effects. The chemical properties of tin are very stable. Tin is not easily oxidized by oxygen at room temperature. So it often maintains a silvery sheen. Note: Pure tin is non-toxic. It is often plated on the inner wall of the copper pot to prevent the copper warm water from producing poisonous patina. Toothpaste shells are also usually made of tin. The toothpaste shell is made of two layers of tin with a layer of lead in between. In recent years, some countries have gradually replaced tin with aluminum to make toothpaste shells.
Secondly, tin foil is a unique handicraft in China in the early years. In ancient times, its main use was to make money to worship ghosts and gods. Various other uses, such as sealing, are now available. The shape of ancient tin foil is rectangular or square, thin paper sheet, which can be folded and deformed. The color of the foil is silvery white. It turns golden yellow when burned. Its main components are tin and aluminum. It is a tin aluminum alloy. Not suitable for food packaging!
Aluminum foil is made by rolling metal aluminum. The thickness of food packaging ranges from 0.006-0.3mm. For example, disposable lunch boxes used on planes are made of aluminum foil. Aluminum foil can be used to heat food in the microwave or oven. Usually, tin foil packaging is also aluminum foil.