1, aluminum material
As a metal, aluminum has the characteristics of easy molding and uniform heat conduction, and can also be mixed with various metals to make composite metal products. Middle and high-grade pots and pans often use aluminum as the inner container. However, aluminum also has the characteristics of easy oxidation, so the inner container of aluminum waterproof stew pot can not directly contact with food, and must be specially treated first.
2, stainless steel material
Stainless steel, as its name implies, is not easy to rust. This metal has the characteristics of corrosion resistance and rust prevention after special treatment, and also has good intergranular corrosion resistance. The best stainless steel plate of household appliances for waterproof stews is generally 304 plates, and almost 202 plates. Good stainless steel materials are expensive and hard to obtain, so we should try to avoid buying inferior stainless steel waterproof stews with low prices.
3. Ceramic materials
The kitchen appliance of ceramic waterproof stew is a safe inorganic material, so it is often recommended to buy it. The rice cooker with purple sand or white porcelain liner is rich in trace elements such as calcium, iron and zinc needed by human body. It is good for people's health to cook food with it. In addition, the food cooked with ceramic rice cookers tastes good.