Open-Air Firing Option for Base Metal Clays

Fire your BRONZclay™ and COPPRclay™ faster and easier with this open-air technique.

Last edited: 7/25/2017
With this open-air technique, you can fire your original and FASTfire BRONZclay™ and your original COPPRclay™ pieces faster and easier without having to follow multiple steps or embed them in activated carbon. The technique, developed by Martha Biggar, was first presented on the Creative Fire website ( and is presented here for your use. This technique involves firing the pieces, then quenching them; quenching removes much of the firescale that may form in the open-air firing.