Madeleine Morris on Nostr: There is a lot of molecular water bound up in Colemanite, and that can cause ...

There is a lot of molecular water bound up in Colemanite, and that can cause bubbling, pinholing and other issues during #glaze firing. The answer is to calcine the colemanite. Essentially put the material into your kiln, and boil off the molecularly bound water.

I didn't know how to do this, so I searched for instructions. Google #AI told me that colemanite should be taken up to 415C and this will caline it.

Luckily, I did not trust it. I asked a human on Glazy. 3/