The breaking or cracking of pots while cooling after firing-caused by cold air getting into the kiln.
The cracking that results from a fired object being cooled too quickly.
Cracks, which occur on pottery during the heating or coolinf cycle of the firing. They are usually caused by the silica inversion at 1063°F (Alpha to Beta phase) or the Crystobalite (one of the 'phases' os silica) inversion at 428 °F in both cases there is an expansion and contraction, of around 2-3%, in the heating and cooling cycles.
Cracking of pottery cause by stresses which form during firing and cooling. Dunting point-573 C.(1063 F.) This type of cracking can also be the result of opening the flues and cooling the kiln too rapidly.
The cracking of pottery caused by stress during the firing and cooling process. During the firing, clay goes through what is called a "silica inversion" at slightly over 400 F and again at slightly over 1000 F. This transformation puts a lot of stress of the clay. Another cause may be the different contraction of the clay and the glaze. All pottery goes through this stress but most are strong enough to withstand it. Dunting is not always evident immediately upon removal from the kiln. It sometimes occurs as much as a month or more later but it should not be confused with cracks caused by "thermal shock". See firing.
Cracks or cracking caused by the too rapid cooling or heating of ware, and due to thermal stresses set up in the body.
Cracking or breaking of pots when cold draghts are allowed to enter the kiln. Can also be caused by the free silica in the body being too fine.
