These pieces go through a major transformation in the kiln with their color, texture and especially form.  They all started out nearly identical.  A stacked tower of clay disks.  As the kiln fires, certain disks begin to slump, bubble and melt into a liquid.  I'm left with a mass of ceramic materials that looks nothing like the stack that went in.  In this sense, I only get to see the work after it is finished and I can only guess about the form, color and textures that I'm left with.  I mix the disks based off of variations of glazes that I know, but the variations quickly diverge from the original glaze, so I am at the mercy of the heat, time, gravity and the materials.  Giving up control to such basic forces is limiting yet liberating.