The high-tech ceramic fiber firing chamber is wrapped in a steel inner case. The outer steel case remains cool due to the layer of air between it and the inner case. In addition, the case is slotted for air circulation. Electrical component The digital SC-2 kiln fires silver clay, decals, china paint, enameling, and glass in minutes up to 2000°F. The SC-2 is popular with seminar teachers because it fires fast, plugs into a standard 120 volt household outlet, ships by UPS The fast-firing element is embedded in the firing chamber shell. The SC-2 heats from the sides and back. Each SC-2 includes a 1/4” thick ceramic fiber shelf.