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bloating

Posted On December 5, 2008 0 Comments
Firing defect where blisters form within claybody, raising large lumps on the surface. 

blistering

Posted On December 5, 2008 0 Comments
Glaze defect where fired glaze surface contains bubbles, which often break open to leave sharp-edged craters in surface. 

blackware firing

Posted On December 5, 2008 0 Comments
Bonfire firing that is smothered with manure and/or sawdust at maximum temperature and then buried in sand, dirt, or ash, to trap smoke, causing wares to turn black. Source: Clay: A Studio Handbook

black-figure style

Posted On December 5, 2008 0 Comments
In ancient Greek ceramics, late Archaic and early Classical style in which figure first dominates, and where figures are in black against a red background. Source: Clay: A Studio Handbook

blackbird; barnard

Posted On December 5, 2008 0 Comments
Slip clay with very high iron content, often used as brown colorant for claybodies. Source: Clay: A Studio Handbook

bisque-firing

Posted On December 5, 2008 0 Comments
Initial kiln firing in which clay sinters without vitrifying, and though very porous, will no longer soften in water. Source: Clay: A Studio Handbook

bismuth subnitrate

Posted On December 5, 2008 0 Comments
Soluble metallic salt—gives metallic luster under LT reducing conditions, especially in fuming and saggar applications. Toxic in inhalation and ingestion. Source: Clay: A Studio Handbook

bentonite

Posted On December 5, 2008 0 Comments
Al2O3×5SiO2×7H2O —Montmorillonitic clay formed from decomposition of airborne volcanic ash. 

bell kiln

Posted On December 5, 2008 0 Comments
A kiln with a stationary floor but where the kiln body can be raised upwards on vertical tracks, making it easy to load and unload large forms. Source: Clay: A Studio Handbook

beading glaze; beaded glaze

Posted On December 5, 2008 0 Comments
A specialized controlled-crawl glaze designed to crack and crawl significantly during firing (due to extreme L.O.I. in glaze materials), and then melt into isolated beads on the surface. Source: Clay: A Studio Handbook