GlassagamaAn adaptation of the coffin kiln that accomodates space and other small chambers necessary for the blowing and annealing of glass. Designed by Fred Herbst, Steve Gibbs and Lewis Olsen "The resulting kiln has an approximate dimension of 12 feet long, 4 feet wide and 5 1/2 feet tall. The chimney is approximately 14 feet high and helps create a very strong flow of flame throughout the chamber. The design dimensions were based on the size of our silicon carbide kiln shelves (18X24 inches) and standard brick sizes in order to minimize cutting. The interior space is approximately 8 feet deep, 4 feet tall, and 27 inches wide. This allows room for three stacks of ceramics, glass melting crucibles, and space for reheating glass. |
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| Construction The physical construction of the kiln started with a layer of cement block on a concrete slab and then three layers of insulated fire brick (IFB) and firebrick forming the floor. The kiln walls are nine inches thick with an inner layer of firebrick and an outer layer of IFB. The kiln roof is made up of two by three foot kiln shelves spanning the walls, next a layer of two inch thick ceramic fiber, and finally a layer of IFB for additional insulation. The chimney flue has a checkered opening pattern that helps create a very even draw throughout the interior. The chimney steps in as it rises to a final outside dimension of 22 1/2 inches square. This part of the structure is tied together with angle steel and threaded rod." |
Source: January 13, 2010, The Glassagama: Ceramic and Glass Artists Work Together to Conserve Resources by Fred Herbst, Ceramics Arts Daily
