David Ruth's glass sculptures are made in a simple combination of processes. Glass is hot cast to make parts. These small pieces are combined in molds in the large fusing kilns. These pieces are fired to a barely molten state to fuse the bits into a solid mass. Any color or images contained in the smaller bits is then visible, almost undistorted, in the larger, complete piece. The fusing, annealing and cooling process can take from a few days up to several weeks, depending on the thickness.