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Egyptian paste

Posted On December 5, 2008 Comments Off
A self-glazing clay body in which soluble alkaline fluxes effloresce to the surface as the piece dries, and subsequently form a thin glassy coating in the firing. Source: Clay: A Studio Handbook

effloresce, efflorescence

Posted On December 5, 2008 0 Comments
Formation of crystalline deposits on surface of clay or concrete as soluble compounds migrate to surface during drying. See Egyptian paste. Source: Clay: A Studio Handbook

earthenware clay

Posted On December 5, 2008 0 Comments
Natural low-fire secondary clay—fluxed with iron, fires porous. Often called “common” clay, found almost everywhere, matures below 2000°F. Source: Clay: A Studio Handbook

earthenware

Posted On December 5, 2008 0 Comments
Low-fired ware, usually still porous after firing—must be sealed with vitreous glaze to be functional. Source: Clay: A Studio Handbook

dunting

Posted On December 5, 2008 0 Comments
Traditional term referring to serious cracking occurring in cooling, resulting from drawing too soon, from extreme excessive glaze-compression, or from low thermal shock-resistance in overvitrified wares resulting from overfluxing and/or over-firing. Source: Clay: A Studio Handbook

drill-mixer

Posted On December 5, 2008 0 Comments
Electric-drill-mounted impeller-mixer excellent for mixing glazes, slips, and slurries and for blunging casting-slip. Source: Clay: A Studio Handbook

drawing

Posted On December 5, 2008 0 Comments
The removing of wares from a kiln. Source: Clay: A Studio Handbook

draw rings; draw trials

Posted On December 5, 2008 0 Comments
In vapor-glaze firing, small rings of clay, formed to stand vertically, which are placed inside a peephole and may be removed with an iron rod during the firing, quenched in water, and examined to determine the degree of glaze deposition. Source: Clay: A Studio Handbook

draft

Posted On December 5, 2008 0 Comments
The flow of exhaust gases out of a fuel kiln, affecting intake of flames and secondary air. Source: Clay: A Studio Handbook

downdraft

Posted On December 5, 2008 0 Comments
Kiln where exhaust gases exit through flue at floor level. Source: Clay: A Studio Handbook