With continuous heat of 1,000 °C, 2.2 tons of quicklime can be produced from approx. 3 tons of limestone, which is later processed with water and sand into plaster and mortar. 15 stere of firewood makes oven doors and limestone glow cherry red. 

The burning process takes 4 days and must be constantly monitored. At the end of the 4th day, the oven is opened, the glowing mass is removed and the limestone is quenched. Witness this spectacular event!