Sculpture ceramic vocab
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24 terms
Terms | Definitions |
|---|---|
 bisque | unglazed but fired ware, usually accomplished in a low temperature firing prior to glaze |
| burnishing | polishing with a smooth stone or tool on leather-hear clay or slip to make a surface sheen, the surface will not stay shiny at temperatures above 2000F |
| clay | fine-grained earth materials and when combined with water it is plastic enough to be shaped |
| coiling, coil-building | constricting hollow forms of rolling and attaching ropes of soft clay |
| greenware | finished leather-hard or bone-dry clay pieces not yet fired, raw ware |
| kiln | electric or gas oven that heats clay up to very high temperatures |
| kiln furniture | refractory shelves and posts which ceramic ware is placed while being fired in the kiln |
| kiln wash | a protective coating of refractory materials applied to the surface of the shelves and the kiln floor to prevent excess glaze from fusing the ware to the shelves |
| pinching | moving and shaping clay, usually with the fingers |
| plasticity | move-ability and stretch of the clay |
| pug mill | a horizontal machine with blades used to bring clay into a workable plastic state |
| shrinkage | contraction of clay in either drying or firing, it loses actual mass due to evaporation of water |
| slab construction | a hand-building method in which forms are created by joining flat pieces of clay, the pieces are thinned and flattened with a rolling pin or a slab |
| slip | a suspension of ceramic materials in water, generally refers to casting slip for molds, can mean a liquid clay englobe for decorating or a glaze slip |
| bone dry | an unfired piece must reach this stage of dryness to be bisque fired |
| grog | ground, fired clay which added to clay bodies to give strength and reduce shrinkage |
| leather hard | condition of clay when most but not all moisture has left the clay body |
| rib | a tool used to form clay on or off the wheel |
| scoring | texturizing the surface where two pieces of clay are joined to create a strong joint |
| wedging | a process that prepares clay for forming, this is the most important step in clay work |
| tooth | texture of quality of coarseness in a clay body necessary in clay to make it life and support weight in hand-building, results from addition of fine grog, sand, or any slightly coarse particles |
| warping | distortion of a pot in drying because of uneven wall thickness or a warm draft of air, o in firing when a kiln does not heat uniformly |
| vitreous | glass like, hard, dense, pertaining to the hard, glassy, and nonabsorbent quality of a body of glaze |
| plaster | a material that when mixed with clay is highly combustible when both clay and this material are heated together |
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