The watering can used to be called "dipping", not "spraying". In the past, the slurry was raw slurry, and there was another kind called powder slurry; Now the pulp is virgin pulp and glass water, in order to increase brightness and make the pot look brighter and more dazzling. In the past, the watering can was made without glass water, and it was still possible to carry the pot for making tea.

Teacher Xu Jianjun said that even if glass water is added, it is harmless to human body because it is fired at high temperature, but this kind of pot is particularly difficult to maintain, and it will be almost the same as a new pot after one year. I suddenly thought of a famous saying, Confucius said: it's hard to keep a woman and a watering can.

What watering can needs glass water? I understand the so-called spray cylinder, that is, the raw materials are made into slurry in the ball mill cylinder, and then injected into the gypsum mold by the shaper. The function of glass water is to make the mud not precipitate and play the role of suspending mud. Add soda ash when using glass water.