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24 terms

Sculpture ceramic vocab

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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