2, purple sand material. Most people will choose purple casserole when they buy soup pots, because the purple casserole is very healthy, but only if the purple casserole you buy is made of natural purple sand. Because only natural purple sand will have a health care effect, and the soup is relatively fresh.
3, stainless steel material. Stainless steel soup pot is characterized by good appearance, large capacity and boiling resistance. Can be used for stewing chicken soup, sparerib soup and other soups that need to be boiled for a long time. The soup cooked in stainless steel soup pot tastes light, unlike the original soup cooked in purple casserole. Moreover, it is best not to add Chinese herbal medicine to stainless steel soup pot, because Chinese herbal medicine contains a lot of alkaloids, which will react chemically with stainless steel when heated.
4, crock. A crock is clay made of raw materials such as seasonable, feldspar and clay. It is fired at high temperature. The crock has good air permeability and adsorption, and also has the characteristics of uniform heat transfer and slow heat dissipation. When cooking soup, the crock can transfer the external heat energy to the internal raw materials in a balanced and lasting way, which is conducive to the mutual penetration of water molecules and food, so that the longer the mutual penetration, the fresher the taste of the soup.