Because the pots are different in thickness and size. Even with the same caliber, the thickness is different.

It is safest to use an iron pan.

Although the iron pot looks heavy, it is durable and heated evenly, which is beneficial to people's health. Because of its moderate thermal conductivity, the iron pot is easy to combine with acidic substances when cooking, which increases the iron content in food by 10 times, thus promoting blood regeneration and achieving the purpose of enriching blood. It has become one of the first choice cookers for China people for thousands of years.

Professor Su, vice chairman of China Nutrition Society, pointed out that using traditional iron pots in China is the safest kitchen utensils at present. Iron pots are mostly made of pig iron and generally do not contain other chemicals. In the process of boiling, there will be no dissolved substances in the iron pot and there will be no problem of falling off. Even if iron is dissolved, it is beneficial for human body to absorb it.