Posted On December 5, 2008
Serious affliction of the wrist resulting from excessive and/or stressful repetitive-motion activity such as hand wedging clay. Source: Clay: A Studio Handbook
Posted On December 5, 2008
Usually purposeful effect where carbon is trapped within surface of the glaze, giving smoky shaded areas, especially in shino glazes. Encouraged by slightly early body reduction; can be promoted in high-fire by brushing saturated soda ash solution over glaze. Source: Clay: A Studio Handbook
Posted On December 5, 2008
Refractory red stoneware clay, used to obtain rich red and brown colors in high-fire claybodies. Source: Clay: A Studio Handbook
Posted On December 5, 2008
Firing defect where excessively fast bisque-firing and/or excessive early reduction retard outgassing, causing carbon and sulfur to be trapped within claybody.
Posted On December 5, 2008
Kiln where kiln floor and often the door are mounted on a car that may be rolled in and out of kiln on tracks. Sometimes has two cars, with doors in both ends of the kiln. Source: Clay: A Studio Handbook
Posted On December 5, 2008
Adjustable tool for measuring inside/outside diameters, as in making lids. Source: Clay: A Studio Handbook
Posted On December 5, 2008
CaSiO3—used in partial replacement of silica and whiting in HT bodies, improves thermal shock resistance. In some cases, it is used in place of whiting to eliminate L.O.I. Toxic in inhalation. Source: Clay: A Studio Handbook
Posted On December 5, 2008
Ca3(PO4)2—HT flux—opacifier in LT glazes—translucence in HT glazes (from colloidal phosphorus globules) and especially in bone china (from supercharged glassy-phase). Toxic in inhalation. Source: Clay: A Studio Handbook
Posted On December 5, 2008
CaCO3—alkaline earth, contributing calcium oxide to glaze—powerful AT flux—major HT flux for glazes—gives strong durable glass. Sometimes used in low-fire claybodies to extend firing range and give greater fired strength. Source: Clay: A Studio Handbook
Posted On December 5, 2008
CaO×3B2O3—traditional important LT alkaline flux, but is no longer being mined. Replace with Ferro 3134 for LT glazes, commercial Gerstley borate substitutes for HT glazes. Test all substitutes. Source: Clay: A Studio Handbook
