How to Make a Plaster Mold

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1
Frame on soaped melamine surface, seal outside edge with clay

Frame on soaped melamine surface, seal outside edge with clay

2
Sealing edge

Sealing edge

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3
Center tile in frame

Center tile in frame

4
Brush soap or silicone spray over tile surface

Brush soap or silicone spray over tile surface

5
Weigh  plaster  1937 g

Weigh plaster 1937 g

6
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.

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.

7
When plaster thickens to heavy cream feel slowly pour into frame

When plaster thickens to heavy cream feel slowly pour into frame

8
Fill frame

Fill frame

9
Tap table with rubber mallet to bring any air bubbles to surface

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

10
After plaster loses its sheen and has hardened some, invert and trim off any extra globs

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

11
Use knife or metal strip to bevel all edges

Use knife or metal strip to bevel all edges

12
When tile starts to dry a bit, pry out and clean up mold edges

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

13
Finished mold, let dry completely before use

Finished mold, let dry completely before use

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