Left: Plainsman 3B, a raw quarry material that fires as a dense buff stoneware at cone 6-8. Right: Plainsman Coffee clay, stained black using raw umber. Both were fired using the C6DHSC firing schedule. The inside glaze is the GA6-B Alberta Slip base.
GA6-C - Alberta Slip Rutile Blue Cone 6
Plainsman Cone 6 Alberta Slip based glaze the fires bright blue but with zero cobalt.