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Definition
| Highly plastic refractory clay that fires off-white. a sedimentary clay that is a component of clay bodies. Carbon is found as an impurity in the clay. |
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| Kneading clay by the hand to rid the clay of air bubble and/or to create a homogenous mixture. |
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| a soluable resist media used to prevent glaze from sticking to the bottom of a pot or used as a decorative method. |
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| the water that resides between the sub-micronic crytals of clay and promotes the quality of malleability of the material. |
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| a hard,dense and durable clay body usually fired above 2150 degrees . It has a small percentage of iron as colorant (less than 2%) and less than 5% absorption. |
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| a method of decorating with an engobe or glaze squeezed from a bulb or syringe to produce linear dotted or marbleized pattern. |
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| a naturally occuring clay that has sufficient flux in it so that it becomes a glaze when fired to high temperature. Albany clay from New York is an example of this type of clay. |
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| sedimentary clay or secondary clay |
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Definition
| these are clays that have been transported away from the parent rock through some mechanical means such as erosion or glaciation. |
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Definition
| the method by which two leather hard pieces of clay are joined together. |
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Definition
| this refers to a material that resists melting or fusion |
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| primary clay or residual clay |
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Definition
| clay that is found at the site of the parent rock. Generally, these clays are very white and not very plastic. |
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| the ability of a material to absorb water. |
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Definition
| water that is left in the clay even though it may appear completely dry. |
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Definition
| a white, high temperature clay body normally transluscent where thin. |
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Definition
| workability, ability to form into a vareity of shapes. |
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Term
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Definition
| refers to the efficient combustion of a fuel. Ample amount of oxygen is available for the most efficient release of energy. The flame is characterized as bein short and blue in color. |
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| a Japanese term for a traditionally Korean method by which a colored clay (generally) white is inlaid into a darker color clay. |
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Definition
| clayt that has lost most of the water of plasticity but not all. As a result it can be bent into shapes and will hold its form. The clay is stiff enough to support itself but still can be bent into shapes. |
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Definition
| a furnace or oven built of heat -resistant (refractory) materials of firing ceramic items. |
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Definition
| a pure, white, not very plastic clay that is major component of white clay bodies like porcelain. |
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Definition
| a mineral that gives earthenware its red color and is used as a stain on biqsue ware. It is also a strong flux. |
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Term
| hydrated alumina silicate |
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Definition
| the formal "chemical" name for clay |
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Term
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Definition
| crused or ground up fired fire clay that is added to the clay to reduce shrinkage, warping and cracking as the clay dries and allows moisture to escape during the initial stages of the firing. |
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Definition
| clay objects that are bone dry |
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Definition
| a general term for the rock that makeup 60% of the earths crust is the "parent rock" of the clay. |
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Definition
| the firing of the glaze coated bisque work, usually to a higher temperature that makes the clay body dense, hard, and vitreous or glasslike. |
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Definition
| any vitreous coating that has been melted onto a clay surface by the use of heat and is composed of silica (glass former), alumina(stiffener) and flux. |
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Definition
| a catalyst that lowers the fusion or melting point of another material. |
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Definition
| a high temperature clay used to make refractory bricks for kilns, furnaces, boilers and other high temperature applications. Often has an excess of silica or alumina. |
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Definition
| a very common mineral and technically a component of granite. |
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Definition
| forcing plastic clay through a die to generate a linear component that is used in the construction of a clay form. It can be either solid or hollow. |
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Definition
| a liquefied clay or slip tat is used to decorate or mask the underlying clay body. Often colored with stains or oxides. |
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Definition
| usually a high iron bearing clay tha is quite porous (10-15% water absorpotion) tha is firing at low temperature. |
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Definition
| no galze on the foot or bottom of the ceramic form. This can be done by wiping the bottom of the pot clean with a sponge or using wax resist to prevent the glaze from adhering. the wax then fires away. |
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Definition
| Generally, this term refers to this use of opposing characterictics when considering design, Black/white, rough/smooth, warm/cool, are examples of this concept. |
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Definition
| this refers to the thickness of the clay wall appropiate for particular fifring schedules. At MC the "cross section" of the clay wal is 3/8. |
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Definition
| the natural mineral (like red iron oxide) or commercial ceramic stain that is added as a percentage to the glaze or englobe formula. |
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Definition
| water that is chemically combined with the clay particles. |
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Definition
| a mixture of clays and other minerals blended together to achieve a particular ceramic purpose. |
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Definition
| clay that has lost all of the water of plasticity |
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Definition
| the first low temperature firing (between 1650 & 1950 degrees F.)of clay which renders it porous, relatively strong and easy to glaze. |
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Definition
| unglazed, but fired ware, usually accomplished in a low temperature firing prior to a glaze fire. |
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Definition
| a turnable used to gain easy three-dimensional access to in-process art work. |
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Definition
| the non-clay flay object, either round or square, and generally porous on which one build a clay form. |
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