Tin foil is generally bright and matte. The tin foil used for baking food can be facing up. It is best to use bright surface contact (wrapping) food to improve the efficiency of heat transfer.
The price of tin foil is generally around 10 yuan, the width is 30cm, the length is 5m, 10m, you can choose according to your needs. In addition, the package is preferably equipped with metal serrations for easy cutting.