BatA removable board. A wheel bat clips onto the wheel so a pot can be lifted without touching it. Store work on plastic bats, never wooden ones.
BisqueClay after its first firing: hard, porous and ready for glaze. It dings when you tap it.
Bone dryUnfired clay that has lost all the water it can. Pale, chalky and as fragile as a cracker.
CenteringGetting a spinning lump of clay to run perfectly true on the wheel. The first skill, and the slowest to click.
Clay bodyA particular clay recipe, like 52 Buff or B-Mix.
CoilA rope of clay, and the method of building with them.
ConeA measure of heat and time together. Our bisque goes to cone 05; our glaze firing to what we call cone 5½. 05 is much cooler than 5. The zero matters.
CookieA thin disc of clay under every piece in the glaze firing, so drips glue the cookie instead of the kiln shelf.
CrawlingWhen glaze pulls back into islands as it melts, leaving bare patches.
CrazingA fine web of cracks in fired glaze. Lovely on a vase, not okay on anything for food.
Dipping glazeGlaze in a big bucket that a piece is dunked into. It has its own certification.
DrapeLaying a slab over or into a form so it takes the shape.
Flux glazeA glaze that makes other glazes melt and move. Buy-your-own, and some need a glaze catcher when they are on the outside.
FootThe bottom a pot stands on. Always bare of glaze.
GlazeA coating that melts into glass in the kiln.
Glaze catcherA dish a runny piece sits in during the firing, so drips land there instead of on the kiln shelf.
GreenwareAny unfired pottery, wet or dry.
GrogBits of already-fired clay mixed into a clay body. It adds tooth and makes the clay more forgiving.
KilnThe furnace that fires pottery. Staff-only, always.
Kiln ticketThe slip that travels with a piece: name, date, clay, every glaze and the order number.
Leather hardFirm enough to hold its shape, damp enough to carve. Feels like cold cheddar.
LinerA plain, dependable glaze for the inside of anything you will eat or drink from.
Maker’s markYour signature or symbol, scratched into the bottom.
Mold RoomWhere the slab molds live, each on its own numbered spot. Look it up in The Book of Molds first.
OpeningPressing down into centered clay on the wheel to make the floor.
PinchShaping clay by squeezing it between thumb and fingers.
PullingRaising a pot’s wall on the wheel by squeezing the clay upward.
RibA flat scraper for smoothing and shaping.
ScoreTo scratch crosshatches into two surfaces before joining them.
SgraffitoScratching through underglaze to draw with the clay beneath.
SlabA flat sheet of clay.
SlipHere it means one thing: clay mixed with water to the thickness of heavy cream, used as glue for joins.
SlurryThe wet clay mush that builds up while you throw. A little helps your hands glide; a lot is your pot dissolving.
StonewareClay fired hot enough to turn dense and durable. What finished pieces become.
ThrowingMaking pots on the wheel. The word comes from an Old English word for twisting or turning, so nothing actually gets thrown. Usually.
TrimmingCarving extra clay off a leather-hard pot, usually to make a neat foot.
UnderglazeColor that stays exactly where you put it, for painting and drawing.
Wash PitThe sink area. The clay sinks only take settled water from the top of your bucket, and clay never goes down a drain or into a sink.
Wax resistWax painted on to keep glaze off an area, usually the bottom.
WedgingKneading clay to push out air and even it out. The least glamorous four minutes in pottery, and the most useful.
Wheel headThe flat spinning disc on top of the wheel.