01/10/2018
Types of Kilns
Kilns are where the magic of pottery happens. The process of firing turns clay into ceramics and your raw work of art into a finished masterpiece. While early kilns consisted of a bonfire over a hole in the ground, technology has vastly improved to create sophisticated ceramic kilns. How a ceramic piece is fired has a huge impact on the look of the finished result. Kilns are freestanding, and their size can range from the size of a stove to a full room. The three most common types of kilns are electric and gas . Electric kilns are probably the most common type of kiln used in ceramics. They're comparatively inexpensive, and small ones can plug directly into a 120-Volt wall socket, making them accessible to small pottery operations. Gas kilns run on natural gas and fire in reduction, which doesn't allow oxygen in during firing. Raku kilns are another type of specialty kiln that yields a specific finish. Raku pottery is heated until it's glowing, and then pulled with tongs out of the kiln. After it cools, the piece is immersed in cold water, creating a crackle effect. Unglazed areas of the clay become black from the carbon in the burning fuel, and when the carbon is scrubbed off, a bright metallic finish is revealed.