Pit firing is a primitive form of firing that has been practiced for many years.  In this type of firing, the pots are traditionally prepared by burnishing them with a smooth, tumbled stone when slightly past the leather hard stage.  This creates a glossy surface on the pottery, thus enhancing the color formation and tactile feel of the pieces after pit firing.  Additionally, terra sigillata may be applied to the pots, then buffed for added sheen in preparation for pit firing.  When bone dry, the pots are then bisque fired at Cone 014-012 range, allowing the clay body to stay fairly porous to facilitate better flashing and color development during the firing process.

A rectangular pit is dug in the ground and a bed of sawdust is spread on the pit floor.  The pots are then nestled in the sawdust and various organics plus copper carbonate and salt are sprinkled around each of the pots.  Cow dung is spread throughout the pit on the pots to enhance color and to insulate the pots during the firing and reduction process.  After the fire has burned down a bit (about an hour later) tin panels are put across the opening of the pit for a reduction atmosphere to occur within the pit.  The pots are then left to burn overnight and the pit is uncovered the next afternoon (when cool enough) to retrieve the pots.  The ash cover is then wiped from the pots and they can be sealed with a beeswax polish to enhance the color and preserve the exterior, although they are still not water tight or food safe. 

If the weather has cooperated and the kiln gods were with you during the night, you can expect some unique, earthen treasures from the fire, painted by the flames as they danced about the pit!