Able to be used on all heat sources and dishwasher and freezer friendly. This is the product of sixty years experience which has resulted in the natural fusing of classical and modern design Our G-Series terracotta comes from north-east Spain, in the Girona region. The glaze is guaranteed to be lead and cadmium-free in line with EC legislation. The tagines are of very heavy construction and especially suitable for the slow Moorish dishes of southern Spain We recommend that you soak your terracotta cookware in warm water for about five hours before using for the very first time.