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Trick to an easy core mould.

This application isn't the best for all core moulds, but it can be a lot easier when working in small scales like a hand or foot. Normally to get the correct thickness for a final skin, you'd line the inside of the mould with clay and pour plaster as your core, but sometimes a mould can be to small to get your hand in to line with clay. Here's an easy way to get a core mould made from plaster without clay.

First I pour plaster into the mould

Next I take a dermal with a cutting disk and cut away the plaster to the thickness I'd like the final skin to be.

Any small areas I can't reach with the cutting disk, I switch to a smaller bit and slowly take out the rest.

Finally, I clean up the corners and drill a pour hole, two if the mould doesn't have an area for air to move out while pouring silicone in.


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