Sand Cast
Posted January 31, 2010
By admin
how do I sand-cast porcelain?
This sand-casting method will only work with things that can have 1 side untouched.
Obytain the sand-casting sand from the hardware/arts supply store. Mix it and pour it into a container that is bigger than the shape you want to cast it into. Let the sand dry for aproximatly 3 hours, or until moist to touch but will stand up on it's own. Carve out the negative of the final shape that you want into the sand while it is still moist (note: smooth the clay very carefully and very smooth or the texture of the porcelain will be terriable). Let this set for 2 to 6 hours. Pour in a slurry of the porcelain clay. Shake it lightly to let any air bubbles come to the untouched surface (note: be careful not shake too hard as this removes the details that you want in the cast.). Let the porcelain dry until it is ready to fire. Loosen and remove some sand in a line about 2 inches around the clay, leaving sand around the clay alone. Place a thick foam mat on top of the cast, and slowly flip the container over. Brush away/remove the sand around the porcelain and brush away any excess particles. Fire as usual.
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