Be sure to fire ceramic bisque high enough to eliminate any chance of the fired piece absorbing moisture. Moisture absorbed after the piece has been glazed will cause it to expand and crack the glazed surface, which is called crazing.
Load only bone-dry greenware into your kiln.
Wet greenware may crack during firing or explode, resulting in damage to other ware in the kiln.
Ceramic greenware should be dried for at least two days, with larger or thicker pieces requiring even longer before firing.
Did you know that ‘blowing' means that a piece has exploded during the firing process?
In the firing process, ‘volatilization' means the action produced within a firing where some materials are changed from a solid to a gaseous state, such as water turning to steam.