The first firing (bisque firing) was traditionally between 850°C and 900°C. A porous body was important for powder glazes so that the mixed powder glaze adhered to the body. However, BOTZ glazes can be applied very well to higher-biscuited goods, as they contain an adhesive that allows the glaze to adhere firmly. Advantage of a baking temperature of approx. 950°C : at a high baking temperature, the outgassing process of the clay is largely complete and the glaze is not "disturbed" by clay gases in the second firing, ie there are fewer bubbles and craters.