This series was designed with the contemporary studio market in mind. This collection of brilliant colors are similar to Spectrum’s classic 300 series majolica-ultraglaze, due to the versatility of being able to be used under or over a glaze. This makes a wonderful product for drawing decorations on your pieces. They have been very happily received by the numerous children who are not as comfortable painting with brushes, particularly lower school children. Fire to cone 04/05 on cone 03/04 bisque. It is lead free and dinnerware safe*.