In French, the names means hiding pot. The salt-bisque firing method is a single-firing technique. Bone-dry ware is air-brushed with white and colored terra sigillatas, a super-refined clay slip, then packed in the kiln surrounded with random combustibles. Everything from Avon cosmetic catalogues to dead zucchini will do fine! Fired to cone 06 (about 1850F), the salty kiln atmosphere is created by blowing a charge of rock salt into the hot kiln at the peak of the firing, though one of the peep holes. The fumes move the colored slip around on the work, creating cloud-like images, and can even cause colors to become fugitive, travelling to an adjacent piece.