These two bricks were part of the bag-wall of the soda kiln at the Armory. The kiln’s north bag-wall had started to shift and lean toward the wall of the kiln through recent firings, and during firing no. 7 they had finally moved enough to fall into the firebox during the firing. (I was trying to wait a few more firings and for the Holiday break to work on it, but… and it wasn’t major at all and was very easily repaired!)
The bricks became fused together in the direct path of the flame and the soda solution spray… add the heat and accumulation of soda from many previous firings (as part of the kiln’s interior) and the form, texture, color, and surface changes into something rather amazing.