Rollin Karg’s sculptural forms are distinguished by his unique style of layering color and form. The colors that you see in the glass are colored glass, most of which Rollin makes. A mixture of the raw materials - sand, soda ash, and lime are shoveled into a furnace with a temperature of 2400 degrees for 12 hours. He works the glass at a temperature of 2090 degrees. The glass pieces are built up in layers from the inside with the color generally going on the pipe first, then clear glass gathered over the outside. With his larger pieces, a team of assistants is required, as such a piece would be impossible to do by himself.