Why can you use a glass Sancai cup purple clay teapot to brew tea?

Both are fine, but the purple clay teapot is better for making tea.

Purple clay teapots are less likely to go rancid due to the excellent air permeability of the purple clay material. Secondly, because the purple clay teapot is made with tight seams, it reduces the channels for air mixed with aflatoxin to flow into the teapot, thus relatively delaying the time when the tea juice goes bad. This is because the shrinkage rate of the purple clay material is small, the molecules are arranged in a scaly shape, and it is not easily deformed when fired; and the purple clay teapot is finely made, the mouth and lid can be closely matched, and the displacement tolerance can generally be controlled within 0.5 mm, while the lid of the porcelain teapot The displacement tolerance is generally between 1 and 3 mm, or even larger.

The linear expansion coefficient of purple clay teapots is slightly higher than that of porcelain, but since the inside and outside are not glazed, there is no concern about glaze stress. The high alumina content in the raw materials makes the purple clay teapot have thermal shock resistance and high mechanical strength, and can overcome the stress caused by sudden changes in cold and heat. Therefore, in the cold winter months, it will not burst when boiling water is poured into it. Once a purple clay teapot is not used for a long time and forgets to pour out the residue, leaving a peculiar smell, it can only be soaked in boiling water, then taken out and immediately immersed in cold water. Repeatedly, as the pores on the wall of the pot expand and contract with heat and cold, the dual pores on the wall of the pot can produce replacement functions during sudden changes in heat and cold, eliminating odors.

Purple clay teapots are not glazed inside and outside. The material has excellent physical and chemical properties, which can play a good role in reconciling the tea soup, maximize the tea aroma and tea charm in the tea leaves, and can be used for a long time. Keeps fresh and won't change flavor easily. When brewing tea in a purple clay pot, the tea juice gradually penetrates into the pot wall, which will mediate the tea tannins. Moreover, tea will have a moisturizing effect through the purple sand, and its extract will not have any adverse effects. Long-term use of purple clay teapots can accumulate "tea rust". Tests by the Shanghai Institute of Biology have shown that tea rust contains griseofulvin, which has anti-inflammatory and disinfectant effects. Therefore, tea stains on the inner wall of purple clay teapots do not need to be cleaned deliberately. The texture of purple clay is rich in iron and other ingredients that are beneficial to the human body. It is often used and has health care functions. Therefore, purple clay teapots are known as "non-toxic tableware" abroad.