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Step 9: Unmolding

The plastic mold opens on one side to make extraction easier.
The plastic mold opens on one side to make extraction easier. Photo: Andrew Liszewski | Gizmodo

Once the damp concrete compound is completely frozen solid it can be removed from the freezer and the mold which is made easier given one side hinges open. You’ll probably want to wait a few additional minutes for the compound to slightly thaw on the outside which makes it easier to extract from the mold.

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