1, the oven does not have to use tinfoil. The role of tinfoil is fast heat transfer, even heat dissipation, so that the food will not be scorched, but also to prevent the food baked out of the oil dirty box, at the same time, with the tinfoil wrapped in food can also be over to reduce the loss of food nutrients and moisture. So when you bake something in the oven, you often use tinfoil.

2, but the oven is not necessary to use tinfoil, easy to paste the bottom of the baking ingredients will use tinfoil, such as fish and meat, if it is cookies and other ingredients do not need to use tinfoil.