3MgO×4SiO2×H2O High-temperature alkaline earth flux in glaze, promotes smooth buttery surfaces, partial opacity. Similar composition to clay, but in LT claybodies gives low shrinkage and high thermal shock resistance, as in standard 50/50 talc/ball clay whiteware body. Highly toxic in inhalation and ingestion. Source: Clay: A Studio Handbook


Back to Glossary