Saltfired pottery is a whole other matter. If you've heard my explanation of the process skip to the photos! Here's the description for those who are still curious: in a propane-fueled kiln filled with pots, when the temperature reaches about 2350 degrees F, we add salt (NaCl, sodium chloride, just like table salt) to the firing chamber. The salt vaporizes immediately due to the high temperature, the sodium in vapor form combines with the silica (SiO2, silicon dioxide) in the clay and makes a clear colorless glaze on the surface of the pottery. The chlorine by-product is exhausted out the chimmney and dispersed into the atmosphere.