No. Tinfoil is a metallic substance that reflects microwaves .

The role of tinfoil

Usually, tinfoil is used as an insulator, for example, if you put a cup of water and an ice cube wrapped in tinfoil in the microwave oven, and then the water boils but the ice cube is almost unmelted.

Tin paper and microwave ovens

Tin paper reflects microwaves, so if you're cooking food that takes a long time, you can use a small amount of tin paper to wrap around easy-to-cook portions, and then remove the paper after cooking for a while to continue cooking, which will cook the food more evenly. However, when you use it, you should put the glossy part close to the food to minimize the reflected energy. It is OK to use the grill function as no microwave parts are used.

If you are using tinfoil on a large area, you can't.? Tinfoil is a metallic substance that reflects microwaves. If it is used, the electrons in the metallic substance are abnormally active due to the high energy that microwaves have. When it reaches a certain level, it will discharge and produce sparks or flashes.