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How to Make a Plaster Mold

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make a plaster mold

How to Make a Plaster Mold

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Step 1 of 13
Frame on soaped melamine surface, seal outside edge with clay

Frame on soaped melamine surface, seal outside edge with clay

Step 2 of 13
Sealing edge

Sealing edge

Step 3 of 13
Center tile in frame

Center tile in frame

Step 4 of 13
Brush soap or silicone spray over tile surface

Brush soap or silicone spray over tile surface

Step 5 of 13
Weigh plaster 1937 g

Weigh plaster 1937 g

Step 6 of 13
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.

Step 7 of 13
When plaster thickens to heavy cream feel slowly pour into frame

When plaster thickens to heavy cream feel slowly pour into frame

Step 8 of 13
Fill frame

Fill frame

Step 9 of 13
Tap table with rubber mallet to bring any air bubbles to surface

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

Step 10 of 13
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

Step 11 of 13
Use knife or metal strip to bevel all edges

Use knife or metal strip to bevel all edges

Step 12 of 13
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

Step 13 of 13
Finished mold, let dry completely before use

Finished mold, let dry completely before use

Start Over

64
5 Comments
Supplies
Embed

#1pottery plaster

Water

1x2 wood frame- mitered corners

Mold soap or silicone spray

Leatherhard clay tile

Soft clay for collet

Brush

Alyssa Noel

Thank you :) haha

Alyssa Noel 3 months ago

Lisa Salisbury

list of ingredients is in the supplies area above

(author) 3 months ago

Alyssa Noel

So I'm not familiar at all with this process. Could u put a list of ingredients? for example what do u mean when you say powder? for all I know it is cooking flower.

Alyssa Noel 3 months ago

Lisa Salisbury

Thanks to Anne D for the tile we used in mold!!

(author) 3 months ago

Linda O.

Cool mold ;)

Linda O. 3 months ago

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