Generally speaking, unglazed or high-temperature glazed tea sets are non-toxic, while brightly colored low-temperature glazes may be toxic; According to the firing temperature, firing above 1300 Baidu is basically non-toxic.

Judging from the material, in general, brightly colored tea sets are more likely to be toxic, but of course not all of them are toxic.

For example, the popular ice-cracked multicolored tea set on the market is quite toxic if it is fired at low temperature, but there will be no problem if it is fired at high temperature.

You can tell it simply by a trick, such as pouring a glass of water into a teacup or teapot, waiting for one night, and then pouring it into a transparent glass the next day to see if the tea leaves have changed color. If it changes color, it is best not to use it again.