National Standard Bentonite fired to 1650F in a crucible

The powder was simply put into this cast crucible and fired. Sintering is just beginning.

Materials	Bentonite Bentonite can make a clay body instantly plastic, only 2-3% can have a big effect. It also suspends slurries so they don't settle out and slows down drying.
Materials	National Standard 325 Bentonite
Glossary	Sintering A densification process occurring within a ceramic kiln. With increasing temperatures particles pack tighter and tighter together, bonding more and more into a stronger and stronger matrix.
Temperatures	Comparison of frit melts at 1650F (900C) (1650-)