Advantages: Purple sand is a unique mineral resource in China. Zisha pottery originated in the Song Dynasty and flourished in the Ming and Qing Dynasties. People in China have used it to cook food and make tea for more than 1000 years. Purple sand does not contain any harmful substances. Purple sand is rich in iron and contains many trace elements needed by human body. Iron can decompose fat in food, lower cholesterol, prolong life, protect health and prevent diseases, improve children's intelligence, and make women lose weight. beauty beauty has a miraculous effect. Purple sand can improve the pH value of food through mineralization, which is beneficial to the formation of alkaline health of human body. Purple sand pottery can emit rich far infrared rays during heating, which is the mineral effect and catalytic effect of natural sandstone.

Disadvantages: it is easy to smell, adsorb and release, which is the biggest drawback of purple sand. Cooking soup with purple sand casserole will lead to odor and odor, because purple sand itself is a kind of soil with many impurities. This material determines that the pot wall made of purple sand will inevitably have tiny sand holes, which will absorb impurities and oils in the soup (sometimes including the nutritional essence of the soup). When the new soup is boiled, it will expand when heated, and the impurities and grease absorbed before will be released from the trachoma again. These deteriorated impurities and oils. Unsealing this is the inherent shortcoming of purple sand. The consequence of unsealing is that the food with strong medicinal properties will lose its original efficacy, because the medicinal properties will evaporate with steam during boiling. The pot itself made of purple sand will slowly release some harmful substances due to repeated heating during long-term use. In addition, there are not many real purple sand products on the market, but more common clay products such as red mud, which lowers another level. Hard-to-clean purple casserole and ordinary casserole, after the old fire soup is boiled, the residual oil and impurities remain firmly on the pot wall and cannot be washed off. This is also an extension of the above.