Generally, it cannot be removed. If it is scraped off, the grinding pot will no longer be usable. It is recommended to change the pot.

Polytetrafluorothene, the English abbreviation of PTFE, (commonly known as "Plastic King"), the brand name is Teflon?, in China, due to the pronunciation, the trademark "Teflon" is also called Teflon, Teflon, Teflon, Teflon, Teflon, etc. are all transliterations of Teflon.

The products of this material are generally called "non-stick coating"; it is a synthetic polymer material that uses fluorine to replace all the hydrogen atoms in polyethylene. This material is resistant to acids, alkalis, and various organic solvents, and is almost insoluble in all solvents. At the same time, PTFE has the characteristics of high temperature resistance and its friction coefficient is extremely low, so it can not only provide lubrication, but also become an ideal coating for the inner layer of non-stick pots and water pipes.