Emile Henry Artisan Collection 13-by-8-Inch Rectangular Dish, Vert/Gr Made in France, each piece is a reproduction of the original shapes and glazes that the first Emile Henry potters produced in 1857 Each piece consists of applying by hand a layer of soft clay onto a mould, which corresponds to the inside shape of the finished item The pieces are glazed by hand -Inchau trempe-Inch, a technique used at the end of the 19th century which involves dipping the dish into the glaze. No two pieces are alike Microwave, convection or regular oven and broiler safe it can go from freezer to oven and be put into the dishwasher for easy cleaning. Emile Henry Artisan Collection is superb at evenly distributing the heat and retailing heat for long periods of time