A new item from Art Clay World is Copper Clay. Somehow this new clay can be fired with a torch. You must qwench the fired piece RIGHT away or it oxidises. To remove the black oxide you must pickle it in a mild acid at 140F! More info click here
Well if it works it should be real easy to use and will save a lot of kiln time as the COPPRclay we have had for a while needs to be fired in a saggar filled with activated charcoal in a digital kiln.