FIRING CHAMBER – The space in the interior of the kiln where the ware is heated.
FURNITURE, KILN – Any of a wide assortment of shelves and posts used in loading a kiln.
They are used in supporting ware to take full advantage of the firing space.
GLAZE – Finely ground glass, suspended in liquid, applied to ceramic ware to give it a glossy
(usually) glass-like surface when melted by firing.
GREENWARE – Any unfired clay object.
HIGH FIRE – Firing to very high temperatures; anything over cone 4. Commonly (cone 6) used
with porcelain and stoneware.
KILN SITTER
® A mechanical device for shutting of the kiln at the desired temperature using
pyrometric cones. It is intended for consistent controlled firing. This device does not always shut
off due to operator induced mechanical variables and must be checked manually.
KILN WASH – A refractory material used as a coating to prevent sticking of ware and glazes to
parts of the kiln and shelves. It is a powder which is mixed with water and applied with a brush.
LIMIT TIMER – Primarily a safety shutoff device (backup) which turns off the kiln should the
kiln sitter fail. It operates strictly by time, rather than temperature and does not exclude the
requirement to attend the kiln when firing. This safety device works best with the Firemate kiln
because the firings are so repeatable that the set time can be set close to the expected firing time.
LOW FIRE – Ware fired only to medium temperature as for earthenware, pottery, or terra cotta.
LUSTER – An over glaze giving an iridescent finish.
MATURITY – The point at which bisque is completely fired and glazes reach the intended
smooth, glassy state.
NESTING – Stacking one piece of greenware inside another, a technique used in loading for
bisque firing.
OHM METER – An electrical measuring device for measuring electrical resistance. This is used
to check elements for aging or an open circuit.
OVER GLAZE – Decorative material applied on top of a glazed surface. Examples are decals,
gold and other metallics, lusters, and china paints. They are always low fired (cone 018 to cone
014).
PEEPHOLE PLUG – A piece of refractory material used to close the peephole.
PINHOLES – Imperfections in a glazed surface characterized by tiny holes.
PINS – Short pieces of high temperature wire used to anchor elements in place.
PORCELAIN – A type of clay body which becomes vitreous and translucent when high fired.
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