Although not really "carving", kiln-carving is a technique that gives glass the look as if someone has carved away part of the surface.
The basic process is simple: cut pieces of fiber paper are arranged on a kiln shelf (usually on a larger base piece of fiber paper) under a piece of glass. When fired, the glass settles into the spaces between the fiber paper pieces.
Once cooled, the glass is turned over revealing recesses created by the fiber paper design elements.
Most kiln-carving works best when the glass is at least 6mm thick. The temperature will determine how "crisp" the design relief on the glass.
