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1. The manufacturing process of the pot is mainly divided into three types.

The first is a stretching pot, which has simple production process and low cost. For the production of non-stick pan, generally is the use of aluminum sheet, with a stretching machine, stretching. Most of the domestic market is the stretching pot, low price, low production threshold. Family workshops can be made. The pot body is thin, and the bottom of the pot will even deform and bulge after burning for a long time.
The second is an imitation die-casting pot. The process is generally similar to that of a drawing pot. Aluminum sheets are also used, but the aluminum sheets of the imitation die-casting pot are thicker and are pressed by a forging press. The cost and threshold are improved. Generally, small and medium-sized factories can manufacture. The thickness of the pot body is significantly higher than that of the stretching pot, which is similar to the thickness of the die-casting pot. Domestic mid-market, the Americas are more common.
The third type is a die-casting pot. The process is relatively complicated. Aluminum ingots need to be melted into aluminum water and injected into a die-casting machine. The pot body is integrally formed through the mold. There are no rivets in the pot body. Generally, rivets exist in the body of the drawing pot and the imitation die-casting pot. This is also an intuitive judgment method. Common in European non-stick cookware, the process cost is relatively high, the pot body is thick, the heating is uniform, and it will not be deformed. Generally, only large factories have the strength to manufacture and are mostly used for export.
Of course, the production process is only one aspect, and it cannot directly explain the quality of the cookware. The non-stick pan depends on the technical level of the coating and spray coating.
2. Non-stick pan coating.

Non-stick coatings currently on the market are mainly divided into fluorine-containing coatings and ceramic coatings.

At least 80% of the non-stick pan coatings on the market are fluorine-containing coatings, PTFE, or silicone resins, including the current medical stone non-stick pan, most of which are also such coatings, not stones. Of course, you don't need to worry about it being toxic, as long as it's a regular brand of fluorine-containing coating, it's harmless. For example, DuPont, Huafu and ilag are all good coating brands. As far as I know, woll and wmf are all coated. The use of fluorine-containing coating cannot exceed 260 degrees, which will destroy its stability. For normal cooking, there is no need to worry. If the food is 200 degrees, it will be burnt into coke long ago ~ ~
The other is ceramic coating, the use of nano-ceramic technology, by molecular tightness to achieve non-stick effect, does not contain PTFE PFOA, high temperature resistance, corrosion resistance, wear resistance, high hardness, the disadvantage is not stick effect is not good, the continuity is not good.