Woodfiring

Woodfiring is a traditional method of firing ceramic pieces in a kiln that is heated by burning wood. This process imparts unique aesthetic qualities to the pottery, often resulting in variations in glaze color, surface texture, and ash deposits. The intense heat generated by burning wood can reach temperatures over 2000 degrees Fahrenheit, allowing for vitrification of the clay body and the development of a durable ceramic object.

The design of the wood-fired kiln itself is crucial to the outcome of the firing. Kilns can range from simple, temporary structures to permanent, complex brick edifices. Features such as the firebox, firebox tunnel, firebox chamber, and chimney all play a role in controlling the flow of heat and flame through the kiln, influencing the atmosphere within the kiln and the resulting effects on the pottery. Different types of wood, such as oak, pine, or maple, can also contribute to subtle variations in the firing results due to their differing burning characteristics and ash content.

The process of woodfiring typically involves loading the kiln with unfired or partially fired pottery, building and maintaining a fire for an extended period, often 24 to 72 hours or more, and then allowing the kiln to cool slowly over several days. During the firing, ash from the burning wood can melt and flow over the pottery, creating natural glaze effects. The movement of flame and embers within the kiln can also produce flashing, which are areas of intense color developed on the surface of the ware. Woodfiring is a labor-intensive but rewarding technique that is appreciated for its connection to natural processes and the distinctive beauty it brings to ceramic art.