During producing flat glass , the glass is slid over the tin.
Graphite is used to slide the tin to avoid getting on the glass.

We use hexagonal boron nitride(hBN) material instead of graphite.
The advantage of hBN is antioxidant and can last long life.
hBN can also be used without nitrogen,which is saving costs.

We can use H boron nitride material to make various forming molds
subjected to your requirement.