2. The function of tin foil is to transfer heat quickly and dissipate heat evenly, which will not burn food, and can also prevent the oil baked by food from polluting the box. At the same time, wrapping food with tin foil can also reduce the loss of nutrition and water in food. So tin foil is often used when baking things in the oven.

3, the oven does not have to use tin foil, tin foil will be used to bake raw materials that are easy to paste, such as fish and meat. If it is biscuits and other ingredients, there is no need to use tin foil.