I adore atmospheric firings, and the pieces that come out of them. These special kilns create a certain type of magic that no electric kiln could ever dream of. The wood kiln leaves deposits of ash in the bases of bowls, and leaves fire marks from where the flame licked across the pot's surface. Salt and soda attack the surface of the clay, leaving orange-peel speckling and a variety in colour and tone. While loading them with pots, there is a fleeting sense of anxiety, as the results will depend on the will of the kiln gods.
One of my favourite marks from atmospheric firings are the tell-tale "doofer" (or "wadding") marks. Doofer is a mixture of highly refractory materials that will not sinter at high heat. Due to the extreme conditions of atmospheric firings, everything in the kiln (including the kiln shelves and posts) need to be stacked onto little rolled up balls, in order to keep the pieces from fusing to the shelves (destroying the pieces, and the kiln furniture) and the furniture from fusing to each other. The doofer lifts the pieces up off the shelf, so the space underneath is exposed to licking flames, and drifting soda/salt vapours. This leaves behind little marks where the clay was not exposed to the atmospheric conditions.
While photographing some of my cups today, I was reminded of my love for these little hints of process, heat, and air. I can't wait to join Marcelina Salazar in her wood-fired soda kiln so I can get some more pieces with lovely little marks.