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Ceramics 1 vocab 5


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Clay that is not plastic
A type of clay body fired to a temperature at which the body becomes vitrified, dense, non-absorptive, but not translucent. Natural stoneware clay is usually brownish in color because of the presence of iron. There are formulated bodies that are white as well.
Slab Roller
a mechanical device for rolling out slabs to a set, consistent thickness
Thermal Shock
The stress to which ceramic material is subjected when sudden changes occur during the heating and cooling processes
To fire clay or glaze incompletely to a point below maturation
forming objects on the potter's wheel using a clay body with plastic qualities.
A general term applied to any ceramic: earthenware, stoneware, porcelain, or any state of fired, green or bisqued clay
Terra Sigillata
A fine slip that was used by the Greeks and early American Native peoples to coat their pottery. It fired red black, according to the kiln atmosphere. It is now easy to color it with any pigment. It is beautiful when it is pit-fired to create subtle differences in the surface.
Triangular or square supports with either clay or heat resistant metal points used to support pieces of glazed pottery or sculpture during the firing. They keep the ware from melting to the kiln shelf.
Pertaining to or having the nature of glass. In ceramics, a vitreous glaze or clay has been fired to a hard, dense and non-absorbent condition
Any one of various methods of kneading a mass of clay to expel the air, get rid of the lumps, and prepare a homogenous material to work with
Wax resist
A method of decoration in which melted wax is painted on to the clay piece. Wax is also used to keep glaze of the foot of a piece of glaze-ware
Terra Cotta
A low fire, porous, reddish clay body, frequently containing grog. It has been used throughout history for common ware and sculpture and has a deep beautiful red color due to the high iron content.
A suspension of clay in water for casting or for painting greenware
Oxide of silicon, SiO2. Found in nature as quartz, flint or sand. It is the most common material in clay.

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