Projects -- Materials

Greenstripe Fireclay
An air floated and flash dried Lincoln Fireclay. It is a secondary clay, high in Aluminum Oxide and refractory with a melting point of 2970 F. Fires a buff color in oxidation and a brown color in reduction. Fireclay deposits were formed over 200 million years ago and most are found under coal seams. Due to the nature of their formation they all contain high amounts of volatiles (materials that burn out during firing) and slow firing is recommended if large amounts are used in clay bodies. Some grogs are made of fired and crushed fireclays. Acute effect: Mild irritant. Chronic effect: May be hazardous over long term due to silicosis.