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stage of clay
clay
| Question | Answer |
|---|---|
| wedge | to read or mix clay by cutting/rolling or pounding; removes air bubbles |
| leather hard | clay which is dried somewhat but which is still damp enough to be joined to other |
| greenware | clay pieces that have not been fired |
| bone dry | the condition of unfired clay when it is as dry as possible prior to firing |
| kiln | a furnace for firing clay products |
| Pyrometric cone | a device for measuring heat in the kiln |
| pinch pot | pinching a ball of clay inside and out to form a cup |
| coil building | using snake like forms to build clay walls |
| slab building | rolling clay into flat forms, cutting and standing them up to create boxes,cylinders |
| Extruder | a lever system for pushing clay into a variety of forms |
| throwing | forming clay on a potter's wheel |
| slip or slurry | a mixture of clay and water used as a binder/glue |
| colored slips | wet colored clay used to decorate |
| soft slab | making a piece with a slab before it is leather hard and without corners |
| slip trailing | decorating clay by squeezing slip out of a bottle |
| sgrafitto | painting slip on clay and drawing through the slip so that the clay body showed |
| stencile | using damp paper towels as a stencil with slip or glaze |
| glaze | a compound of minerals that is applied to the surface of greenware or bisque ware and that forms a glassy coating when fired |
| bisque fire | firing dried clay pieces for the first time in a kiln |
| glaze fire | firing bisque pieces that have been glazed |
| primary clays | clays that are found in the ground at their source of origin |
| peephole | a hole in a kiln chamber, covered with a removable plug, through which one can observe the pyrometric cones, color or atmosphere inside the kiln |
| earthenware | pottery fired to below cone2; usually red and porous |
| kiln furniture | heat resistance posts, shelves, and other devices upon which ware is supported in a kiln during firing |
| kiln sitter | a kiln mechanism that automatically turns off the kiln when a small pyrometric cone in it slumps |
| kiln wash | a refractory coating applied to kiln shelves to prevent excess glaze from fusing ware to the shelves |
| plastic | clay in this stage is wet, soft, workable. you can use it for throwing on the wheel and also hand building with coils, slabs and pinching |
| leather hard | clay at this stage has begun drying the clay is damp but cannot be bent any longer |
| bone dry | also know as "greenware". clay at this stage is fragile. almost all of the water has evaporated from the clay and it can feel dusty to the touch.Be careful handling clay at this stage as it will break very easily |
| Bisque | clay at this stage has been fired once in the kiln.all of the water is gone from the clay it is at this stage that glaze i added onto the clay piece. clay at this stage is still fragile |
| Glazed | clay at this stage has been fired twice and is at its maximum strength.functional work is ready to be used now |