Firing Vessel for BronzClay 2 pc 2.5"

BRONZCLAY TWO PIECE VESSEL -- Two piece firing Vessel. BronzClay must be fired in a firing vessel, embedded in activated carbon. This two-piece 18/8 stainless steel firing VESSEL includes a 7"x 4" x2.5" H container and lid.

Vessel turns black after firing this is normal!