Tin paper: A film-like metallic paper coated or pasted with silver, mostly silver-white, but actually aluminum foil. Aluminium foil, also known as foil in Hong Kong as tin paper, is a tool made of flattened metal aluminium. It is mainly used for cooking in kitchens, carrying food, or making materials that can be easily cleaned. Thousands of tons of foil are used worldwide to protect and package food, cosmetics and chemicals. Most aluminium foil is bright on one side and gray on the other. Aluminum foil for food can be wrapped on both sides. It is usually recommended to wrap it in bright bread to improve heat conduction. [1]

Most aluminium foil is bright on one side and dull on the other. Aluminum foil for food can be wrapped on both sides. It is usually recommended to wrap it in bright bread to improve heat conduction. Aluminum foil is pressed by a rolling machine from aluminium blocks, then cut into the required length and width, and then rolled up, packaged and sold.