Tin foil can't be heated in microwave oven, because it is a conductive metal product. Microwave oven can promote molecular vibration to generate heat, so it can't be heated with metal. Otherwise, not only the food is not evenly heated, but also it is easy to cause short circuit, which will lead to fire and damage the microwave oven. Therefore, it is recommended to use special appliances for microwave heating.

Tin foil can wrap food in the oven, but it can't be put in the microwave oven. This is mainly related to the heating mode of microwave oven. Microwave ovens use microwaves to heat food, but microwaves can only penetrate insulating materials such as glass, ceramics and plastics. For objects containing metal components such as steel, iron and tin, they will become hot or even burn in the microwave oven, so it is very dangerous to put metal objects in the microwave oven. On the other hand, tin foil is a kind of metal material, which is conductive and reflective to microwave. When microwave contacts with metal, it will produce sparks, which is dangerous and even damage the magnetron of microwave oven.

You must pay attention to heating food in the microwave oven. Not everything can be put into the microwave oven. For example, ordinary plastic containers, metal containers, closed containers, bottled foods with narrow bottlenecks, bamboo containers and lacquerware, and glass products with concave and convex shapes are not suitable for use in microwave ovens.