You can use a glazed teapot, which is basically the same as the porcelain in the upper reaches. But the production of purple sand is different from porcelain. The newly mined purple sand mud cannot be directly expanded with water. It should be scattered in the open air, weathered and aged for several months, then crushed and sieved, and mixed with water to make a blank (semi-finished product). Zisha ware doesn't need glazing, and it can be fired in a kiln at 1 100℃ to 1200℃, so it can be elegant in color and durable in texture. The excellent properties and characteristics of purple mud are as follows: 1. Plasticity, more obedient than other ceramic raw materials or clay, wide range of allowable molding, different from ordinary clay, not easy to deform after high temperature firing, and the shrinkage rate of finished products and green bodies is only 10%. 2. After high temperature firing, the finished product can keep 2% water absorption and 2% porosity. 3. The purple sand ware is not glazed inside and outside, and used as a tea set, there is nothing left and there will be no adverse effects. 4. Purple sand utensils can withstand sudden changes in heat and cold, and they are not afraid of bursting when making tea in winter. It can be simmered without damage. Because of the slow heat transfer, it is not easy to handle when using. 5. the teapot is durable, and it can be used as a guide when it is washed and wiped day after day. So the body is jade and crystal. It smells like Wen Ya. It is interesting. You can play with it while drinking.

Therefore, the original teapot is very good for making tea and can retain its breathability. Ancient purple sand is generally not glazed, but it must not be used unless glazed!