The iron mat for steaming steamed buns is called an iron grate. It is mainly to put the food to be steamed on the iron grate, so that the food to be steamed can be heated by steam well, and it is also very strong and can bear the weight on it, and the iron grate conducts heat very quickly, so the steamed buns or buns produced by it have a particularly good effect. This kind of steamer is usually used for steaming.

Comparison between iron grate and bamboo grate

Due to poor air permeability, the steam in metal steamer is easy to accumulate at the top and cannot escape when it rises from bottom to top, resulting in more steam and hot air at the top than at the bottom. As a result, the upper part is wetter and hotter than the lower part. One is that the surface is easy to wrinkle, and the other is that the steamed buns at the top are easy to shrink when it is discharged. Generally, stainless steel steamer contains heavy metals such as NiCr, which is harmful to human body.

bamboo is selected for steamed buns. This kind of steamer has good air permeability and steam water does not flow back, so bamboo will not stick to the bottom. However, stainless steel will accumulate water vapor, which will easily cause steamed buns to stick to the bottom, which will lead to the cracking of the outer skin of steamed buns and the outflow of soup, which will affect the taste of steamed buns. Therefore, it is recommended to use bamboo steamer.