How to Make a Plaster Mold

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Frame on soaped melamine surface, seal outside edge with clay

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Sealing edge

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Center tile in frame

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Brush soap or silicone spray over tile surface

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Weigh plaster 1937 g

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Add slowly to 1 quart of water, let sit for 2-3 minutes then stir slowly by hand breaking up clumps, not too fast you don't want air bubbles.

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When plaster thickens to heavy cream feel slowly pour into frame

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Fill frame

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Tap table with rubber mallet to bring any air bubbles to surface

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After plaster loses its sheen and has hardened some, invert and trim off any extra globs

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Use knife or metal strip to bevel all edges

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When tile starts to dry a bit, pry out and clean up mold edges

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Finished mold, let dry completely before use

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