Nowadays, people pay attention to health preservation. Casserole stew is not only nutritious, but also has a unique flavor, so casserole is deeply loved by people. However, the enamel of casserole contains a small amount of lead, which is easy to dissolve when cooking acidic food, which is harmful to health, so it is best to choose a casserole with natural inner wall color. If the inner wall of the casserole is colored, it is not suitable for storing wine, vinegar, acidic drinks and food. The newly bought casserole can be soaked and boiled in 4% vinegar water first, which can remove most harmful substances.

Selection method of casserole

1. Listen: Tap the jar with a lid or coin. It is best to be clear, bright and crisp. When identifying, turn the bottom of the pot upside down, put your finger against the center of the concave surface, and tap with a hard object. The louder the pot sounds, the greater the finger vibration, the better.

2. Buy casserole on demand: Generally speaking, you don't need a good casserole with pottery for decocting medicine, but you can buy a casserole with low price and no leakage. The pot for stewing food requires higher requirements, and it is best to choose a white casserole with good quality.

3, look at pottery: the pottery used in a good casserole is very fine, the color is mostly white, the surface glaze color is also high-quality, bright and uniform, and the thermal conductivity is good.

4. Look at the structure: a good casserole has a reasonable structure, flat placement, round pot body, smooth inner wall, no cracks and no prominent sand particles. The lid of the pot cover is tight and cannot be changed. You can try to rotate it. If the pot cover clings to the pot body, there should be smooth friction when rotating.

① Look at the pot surface: the pot surface is smooth, but it is not required to be as smooth as a mirror. It is normal to have irregular shallow lines on the surface, but if the lines are too dense, they are defective.

② Inspection: "Small bumps" can be removed by grinding wheel, and "small pits" are of poor quality. Some pot sellers often use graphite to fill their eyes, which is not easy to find. Just a few brushes can expose them.

③ Check the bottom of the pot: The smaller the bottom of the pot, the faster the fire conduction, saving fuel and time.

④ Check the thickness: the pot can be divided into thin and thick, and the thin one is better.