- by vinux
A few days ago, a teapot friend asked a question. He bought a purple sand teapot and found some white grains in it, which looked like sugar. He joked and asked if he had to use sugar to preserve the purple sand teapot. In fact, what the teapot friend referred to as white sand sugar was actually quartz sand. Some other tea friends were scared when they saw this white granular substance and thought it was a chemical pot, but it wasn’t!
Why would a new purple sand teapot have quartz sand in it? As shown in the picture below, this is the pot I brought back from the kiln.
Just fired from the kiln, the pot.
A new purple clay pot, if you observe carefully, you will see some white sand or light purple sand inside. These sands are usually scattered in the bottom of the pot. It can be washed clean with water.
A new purple clay teapot, which has not been cleaned after leaving the kiln, retains its “original flavor”. You must be able to see some white or light blue sand in the teapot. Where does this sand come from and why is it needed?
Tui Ban Kiln is a kind of traditional Chinese kiln, which has been used since the Tang Dynasty (618-907). It is mainly used to produce ceramic products such as tableware and tea sets. The Tui Ban kiln is characterized by its two-story structure, with the furnace taking up the lower level while the smoke channel runs through the upper level. In addition, the roof of the kiln is typically cone-shaped, which helps spread heat evenly throughout the kiln.
To explain the phenomenon described above in simple terms, it is an occurrence in which a person’s behavior or emotions are affected by their environment. This can include external stimuli such as sights, sounds, smells, and other sensory input, as well as social cues like feedback from other people.
Zisha teapots are fired at temperatures higher than 1000 degrees Celsius. When firing, the lid and pot of the teapot are not fired separately; rather, they are fired as one unit. If the lid and body were fired separately, the lid could easily become deformed or damaged and would not fit in with the mouth of the pot.
To prevent the lid of the pot from sticking to the mouth of the pot due to “thermal expansion” and unable to open normally under high temperature, the potters will brush a layer of quartz sand on the lid edge before the purple sand pot is fired into the kiln. Therefore, after the purple sand pot is cooled after firing, these sands will fall into the pot.
Before entering the kiln, brush quartz sand along the lid.
These quartz sands are absolutely non-toxic and harmless. In the daily life, tap water and pure water use many quartz sand layers in the settling process to filter impurities from the water as it passes through these quartz sand layers.
So there’s no need to worry about the quartz sand, just clean it with clean water before use. Now do you understand why there are white grains in a new purple sand pot?