What did the Ancient Chinese use to make their pots look shinny? Why did the Ancient chinese use this?

The Ancient Chinese potters made their pots look shinny. They coated the clay with a thin layer of glass. This glaze they used is called glass. The Ancient Chinese used this glaze on their pots for a few reasons. One big reason the Ancient Chinese used this glaze on the pots was to make their pots waterproof. This kept the porcelain safe. The porcelain wouldn't get damaged by water now that they put this glaze on the porcelain.