Has anyone ever made a ceramic figure using a silicon mold? I have one with some undercuts, so I need to make a mold with something more flexible than plaster. Thanks for any advice.Making a ceramic figure from a silicon mold?
It tain't going to work - something has to suck the moisture out of the slip to make it solidify. Your best bet would be to do one of two things:
1. Make a silicone (not silicon) mold of your original, make a plaster positive in the silicone mold then use plasticine clay to build out the undercuts on the plaster so you can pull a plaster pouring mold for the slip. After you make the clay positive and firm it up you can carve back to the details.
2. Make silicone molds of the undercut areas only and pack them with moderately soft clay to make an undercut detail. Make a plaster mold of a built out original as in 1. Instead of carving back the positive, cut out the built out areas and insert the details molded with silicone.
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