First "look": see if the surface of the cast iron pot is smooth, but it cannot be as smooth as a mirror. Due to the casting process, the cast iron pot has irregular shallow lines. Under normal circumstances,cast iron pans are somewhat rough, which is inevitable, and will become smooth after a long time. Defects and small raised parts are generally iron, which has little effect on the quality of the cast iron pot, but small pits are more harmful to the quality of the pot, so you should pay attention to it when purchasing.

Second "listen": a cast iron pot with uneven thickness is not good. When buying, you can turn the bottom of the pot upside down, press your fingers against the center of the concave surface of the pot, and hit it with a hard object. The louder the pot sounds and the greater the vibration, the better. In addition, rust spots on the pot are not necessarily poor quality. The pot with rust spots indicates that the storage time is long, and the longer the storage time of the pot, the better, so that the internal organization of the pot can be more stable, and it is not easy to crack when it is first used. It is worth reminding that the pot ears of the iron pot are preferably wrapped with wood or other insulating materials. If the iron pot ears are easy to burn.