Bricks with a 5% addition of finely ground calcium carbonate, which fineness was 150µm, were burnt inside a discontinuous furnace with a 6800-bricks firing capacity.
Los ladrillos con adición del 5% de carbonato de calcio finamente molido hasta una finura de 150 [1m, se quemaron en un horno discontinuo con capacidad para la cocción de 6800 ladrillos.