Thursday, June 27, 2013

08 Joint Design Nº 229

I remove the coddles and the clay build-up from the first half of the mold. I cut registration keys and mark where I want the spare to go. I apply parting agent to the plaster mold. Click on any image to enlarge it.

I clean all parting agent residue from the mold, then clamp the coddles in place. I use clay to seal around the edges of the mold.

I mix the plaster to a consistency of 67 (2 parts water to 3 parts plaster by weight). I let the mixture slack so the plaster absorbs all the water. I mix the plaster by hand, squeezing out all the lumps between my fingers. I pour the plaster into the mold box in a steady, even stream. I clean my hands and tools in a bucket of water. Never put plaster (dry, set, or wet) in the drain pipes. I leave the plaster to set for at least an hour.

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