Who is more suitable for making tea, porcelain tea set or teapot?

Purple sand teapot is a kind of porous material with double-hole structure, with high hole density and strong suction. It can absorb the fragrance of tea and keep it for a long time, but glazed ceramic teapot lacks this function. I think teapot is more suitable for making tea than porcelain tea set. The reason for this is the following：

Features of teapot: unique structure

Compared with glazed ceramic teapots, teapot is really not easy to deteriorate and turn sour. This function is determined by the precise and reasonable shape of the teapot itself. The teapot mouth is small (the outlet of the mouth is inclined at a certain angle), and the lid of the teapot mouth is closely matched with a displacement tolerance of 0.5mm, and the lid is of gland structure. However, for glazed teapots, the spout is mostly upward, and the displacement tolerance between spout and lid is about 1.5mm, and the lid forms an embedded lid structure. Because of the high precision of teapot, compared with glazed porcelain teapot, it reduces the passage of air mixed with Aspergillus flavus and other molds into teapot. Therefore, the time of deterioration and rancidity of tea juice is relatively prolonged.

Zisha teapot features 2: unique raw materials

Purple sand is really a unique raw material in Yixing. It has all the chemical and mineral components necessary for pottery making. Microscopic observation shows that the main components of purple clay are Yingshi, clay, mica and hematite. At the same time, the particle composition (naturally occurring particle size) of these minerals is moderate, which is similar to the characteristics of porcelain raw materials in southern Chinese mainland, that is, their mineral composition belongs to clay.

Zisha pot features three: unique technology

Reasonable chemical, mineral and particle composition makes purple mud have good technological properties such as good plasticity, high green strength and dry shrinkage. The fineness of crushed purple mud should pass through a 60-mesh sieve. It takes a lot of effort to make the mud too coarse, and it will stick to the hands if it is too fine, which will cause the surface of the green body to wrinkle, and at the same time, it will also cause the shrinkage of drying and sintering to increase, and lowering the sintering temperature will lead to bubble defects. The mud that has passed the 60-mesh sieve is still thick. During the molding process, the entire body of the device is polished by completing this step to form a dense skin. Because of the existence of cortex, the firing temperature range of the product is expanded. No matter at the upper or lower limit of normal firing temperature, the cortex is easy to sinter, but the inner wall of the pot can still form pores.

Therefore, the finishing process of molding has the function of organically connecting mud, molding and firing, thus giving the surface of purple sand smooth, not glazed but full of luster, although it has a certain porosity, it does not leak.

Characteristics of teapot: unique air hole

After firing at 1 150℃, timely, mica residue, mullite, hematite, double porosity and other phases are formed. Double pores make the product have higher pore density and certain porosity. In addition, there are more crystal phases and less glass in the purple sand mud samples.

Five characteristics of teapot: unique function

Purple mud is a kind of clay with high iron oxide content, which is purple or light purple. Because the teapot body is not glazed, it still has a large water absorption and porosity after firing. According to the measurement, the water absorption of purple sand teapot is between 65438 0.6% and 7.05%. Therefore, the finished product has good gas adsorption performance and permeability, and the tea made from it has good color, fragrance and taste. Teapots are not popular even if they are brewed with boiling water because of their slow heat transfer. At the same time, you can also cook tea on a slow fire, which is not easy to burn.

To sum up, the teapot is really beyond the reach of other ceramic teapots.