• Raw feed - includes blending and grinding of raw shale / clay materials into small particles which are then extruded and wire-cut to size to produce a green brick. • Raw feed sourced from own quarry and locally situated colliery shale spoil heaps (Bings). • Waste brick - GROG. • Green brick fired at approximately 1000ºC. • Kiln settings affect colour of brick. Bricks then cooled, packed, wrapped and stocked. Etna Works Mayfield Works • 2 kilns - 1 Hoffman, 1 intermittent. • 2 kilns - 2 Hoffman. • Workforce - 60. • Workforce - 60. • Capacity - 17 million units. • Capacity - 14 million units. • Firing System - Gas. • Firing System - Oil fired. • Raw feed : • Hoffman - shale / mudstone (colliery bing) • Intermittent - fireclay blends • Raw feed : • Hoffman - shale / mudstone (colliery bing) Please Select . . . . Buff Range > Afton Mixture Atholl Rustic Balmoral Smooth Carron Smooth Kelvin Antique Pentland Mixture Scotch Commons - - - - - - - - - - - - - - - - - Red Range > Border Mixture Bracken Smooth Braidwood Mixture Braidwood Rustic Carrick Rustic Royal Antique Royal Mixture Royal Rustic Royal Smooth Royal Smooth Tumbled