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| A term applied to the first firing of ware in order to prepare it for glazing. Bisque is also a term applied to wares that have been through a bisque firing as in “The potter is getting ready to glaze her bisque pots”. |
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| Clay that has been fired and then ground into granules of more or less fineness. |
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| A ceramic paint typically composed of opaque or transparent colors which becomes vitreous when fired to maturity. |
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| Clay which is exposed to heat 600oC / 1112oF, loses its chemically bound water molecules and can no longer be broken down by water. Once this change has occurred it cannot be reversed. |
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| Engraving a design by cutting or scraping into the clay surface at any stage of drying, from soft to bone dry. |
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| Basically an insulated box, which is heated to fire pots in. |
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| A refractory mixture that is painted onto kiln shelves to make removing glaze drips easier. It is applied only to the top side of the shelf. |
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| Rolling out wet clay into rope like pieces. |
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| A method of hand building a form using rolled out lengths of clay. |
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| Used in the firing process, pyrometric cones are composed of clay and glaze material, designed to melt and bend at specific temperatures in the kiln. |
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| A support on which a clay slab is draped to shape as it stiffens. |
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| The process which changes clay into ceramic. |
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| Slicing off clay to form many angles. |
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| Cutting grooves into clay. |
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| A stage in the drying process of clay when the clay is pliable but strong enough to handle. |
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| The properties of a material that allow it to be shaped and to retain its shape. |
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Definition
| A method of forming clay, which is well described by its name. |
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| Able to sustain repeated exposure to high temperatures without experiencing significant change. Kiln walls are made of refractory firebrick. |
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| Clay that has been changed from a lump into a flat plane by rolling - the process is similar to making a pie crust. |
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| The decrease in the size of a clay object due to drying and firing. |
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| A decorative technique, where by the surface of the clay is scratched, often to expose another layer of colored clay. |
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Definition
| To rough the surface of the wet clay in order to attach another piece of wet clay. |
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| A fluid suspension of clay with and water, with a “cream” like consistency. |
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| The process of pouring slip into a plaster mold. The slip coats the inside of the mold, so when it hardens and you pull the mold away, a cast piece remains ready to decorate and fire. |
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Definition
| Adding small shapes in clay to decorate another clay article. They can be flat or with a molded form. |
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| Method of kneading clay to get rid of air pockets in the clay. |
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| Using a freshly rolled slab of clay to construct something. |
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| To make pottery by hand on the potters’ wheel. |
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Definition
| made mostly of colored pigment and a few binders and additives to keep it suspended as a liquid. Underglazes look like matte paint after firing. If you want them to appear shiny, cover them in a clear glaze and re-fire. |
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Definition
| A glassy, non-porous state caused by heat or fusion. |
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