The stones, which are volcanic, are heated either in oven or on a gas hob. We sell oven especially designed for this purpose as well. The standard heating time is 20 mins at medium heat on a gas or electric hob and 40 mins in an oven at 250 degrees. However, you can adjust this once you know how well you require the different meals to be cooked. The stones retain there heat for forty five minutes after removal. The stones are loaded from the oven onto stoneware plates, which have been specially designed to withstand the intense heat. To serve, ingredients are placed directly onto the hot stones, which cooks and seals without the use of oils or fats, locking in the nutrients and juices. After use your they should still be handled with care using oven gloves as they will remain hot for over an hour. The best way to clean them is to place in a sink with warm water and leave for around 30mins, by which time you should be able to wipe the surface clean. The Lava Stone can be used as well for the conveyor plan of a tunnel oven to achieved energy efficiency and a better bakery product. We can provide just the stones min. quantities 100 pcs or you can buy one of our complete set.