Attached are some things that can't be heated in the microwave oven. I hope I can help you.
1, plastic lunch box for non-microwave oven
Microwave lunch boxes are usually made of PP and PS. PP refers to polypropylene, which has excellent mechanical and thermal properties. PS, commonly known as hard rubber/rubber, is non-toxic, tasteless and safe to use. The lunch box made of PP is soft, while the lunch box with PS is slightly hard.
These two materials are safe to heat in the microwave oven and will not release toxic substances. Therefore, when you buy an outside lunch box and come back to heat it, you must see whether the label of the lunch box is suitable for microwave oven. Some lunch boxes are not made of PP, so they cannot be heated in microwave oven.
If food is casually thrown into the microwave oven together with ordinary plastic lunch boxes for heating, the plastic containers will be deformed during the heating process, and toxic substances will be released to pollute the food, which will be directly exploded in the microwave oven, and people will be poisoned if they eat these polluted foods for a long time.
2, anhydrous food
Because when the microwave oven is working, when it penetrates the articles containing water molecules, the water molecules will vibrate, and intense friction and collision will occur between the water molecules, so heat will be generated and the articles containing water will be heated. Therefore, water-free foods such as dry flour, food-grade anhydrous calcium chloride and anhydrous citric acid are not allowed to be placed in the microwave oven to make the microwave oven work, which will lead to the damage of the microwave oven.
3. Tableware containers containing metal
Tableware containing metal, containers that are not heat-resistant, such as bamboo ware, plastic and lacquer ware, and concave-convex glass products are not suitable for use in microwave ovens. Porcelain dishes cannot be inlaid with gold or silver lace. Because of the iron, aluminum, stainless steel, enamel and other utensils put into the furnace, the microwave oven will generate electric sparks and reflect microwaves when heating, which will not only damage the furnace body but also heat food.
4, closed containers and food with shells
Sometimes we directly heat the fresh-keeping bag with food. Once we forget to let go, the fresh-keeping bag becomes bigger and bigger like an inflated balloon until it bursts. Therefore, when cooking food with a shell, the shell should be punctured first, and the opening of the packaging bag should be loosened to avoid explosion.
A wide-mouth container should be used when heating liquid, because the heat generated by food heating in a closed container is not easy to dissipate, which makes the pressure in the container too high and easy to cause blasting accidents. In addition, don't pour the milk full when heating it, because the liquid will expand after heating and overflow the cup.