Tin foil: a film like metal paper coated or pasted with silver, mostly silver white, actually aluminum foil. Aluminum foil, also known as aluminum foil or tin foil in Hong Kong, is a tool made from flattened metal aluminum. It is mainly used in kitchens for cooking, storing food, or manufacturing materials that can be easily cleaned.

Countless tons of aluminum foil are 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 used for food can be wrapped on both sides, and it is generally recommended to wrap it with glossy bread to improve heat conduction.

Most aluminum foil sheets have a glossy finish on one side and a matte finish on the other. Aluminum foil used for food can be wrapped on both sides, and it is generally recommended to wrap it with glossy bread to improve heat conduction. Aluminum foil paper is pressed out from aluminum blocks using a rolling machine, then cut into the required length and width, rolled up, packaged, and sold.

The initial tin foil was really made of tin. Tin foil is softer than aluminum foil, and wrapping food may have a slight tin smell. However, due to its low melting point or high heating temperature - such as becoming brittle above 160 ℃ - tin foil is limited in its use in food packaging. If you need to barbecue food, tin foil cannot be used when baking food. Since the introduction of aluminum foil, it starts to melt only when heated above 660 ℃ due to its high melting point, making it suitable for general barbecue food, baked goods, and even traditional pheasants that are wrapped and baked with aluminum foil.