Clay pieces and ceramics have long been made in kilns. The idea is to raise the overall heat of the objects inside until they turn into the desired product. Clay pieces are fired in a kiln until they turn into bisque. Once this occurs, they are either used in this form, or they are decorated and glazed. If glazing is necessary, the pieces are fired once again in the kiln. This process sets the glaze by heating the entire object to the correct temperature. This works well in a ceramic kiln that heats all parts of the inside of the kiln. It does not work quite so well with glass fusion art. Glass requires fine temperature control and must only be heated in the area to be fused.
