Aluminum foil paper is pressed out of aluminum blocks using a rolling machine, 

usually using 3000 series aluminum alloy or 8000 series aluminum alloy, 

and then cut into the required length and width, then rolled, packaged and sold.

A large amount of aluminum foil is used around the world to protect and package food, cosmetics and chemicals. 

Most aluminum foil has a shiny side and a dull gray side.

 Aluminum foil paper for food can be used to wrap food on both sides.

It is usually recommended to wrap food on the shiny side to improve the heat conduction effect.