T-Stool, Ceramic prototype, 3-3. 100 cm l. x 60 cm h. x 70 cm w. Materials: Press molded stoneware, with matte white glaze.
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 Form testing through complexly folded surface
 The two part rubber mold prior to assembly. The mold consists of 14 rubber parts and 30 epoxy components. A two part mold is required to provide a rigid surface for the pressing of the clay into the mold. The interior of the mold consists of a 3 mm thick urethane rubber layer surrounded by a 5mm two part epoxy mother-mold. In order for the rubber to be poured evenly a 3 mm layer of wet clay is modeled on top of the positive. Following this a waterproof film is laid up on top of the clay and the epoxy mold is pressed on top of the film. Once the epoxy cures the clay is removed and the mother mold is then used as a cavity to pour in the liquid rubber.
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 A view inside one half of the mold. Roughly 150 kg of clay is pressed into the mold by hand. The surface is covered from the inside to a thickness of 1.5 cm by laying up 1.7 cm thick slabs. A special pressing technique was developed to maintain a uniform thickness and eliminate any visible seams on the finished surface. 
 Rigging required to manoeuver mold packed with 150kg of clay. The clay is pressed in from the bottom leaving a 1.5 cm continuous clay surface. After several days the clay reaches the leather-hard state and the mold is then suspended in stirrups and rotated 180 degrees into the upright position. The mold is designed to be disassembled from the top to the bottom and to provide support for the clay as the mold is removed. While the rubber mold retains considerably more moisture than plaster it has added benefits. The rubber can be removed in areas with significant undercuts, by first taking away the rigid mold and then peeling off or collapsing the rubber.
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 After glaze firing.
 | T-STOOL PROJECT CREDITS | Design and Production:  Rhett Russo  in collaboration with  Katrin Mueller-Russo  | CNC machining:  Jeannie Wu  | Assembly of the positive:  Yasemin Uyar  | Ceramics assistant:  Diego Sinbert  | Mold making support:  Pieluigi Pompei ,  Marlies Crooijmans  | Special thanks to the  Sundaymorning@EKWC  and  Ranti Tjan  for their encouragement and expertise | This project was supported in part by the  Pratt Institute Faculty Development Fund  | EKWC 2012 |
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