Question 1

How do I make a plaster mold from an STL?

Accepted Answer

Upload your STL and Meshcast generates multi-part 3D-printable master shells. Print and clamp the shells together, pour wet plaster inside, let it set, then remove the shells - you're left with a multi-part working plaster mold.

Question 2

Can I use this for ceramic slipcasting?

Accepted Answer

Yes. The resulting plaster mold is ideal for slipcasting: pour liquid clay slip in, the plaster absorbs water to form a clay wall, then release the greenware by separating the plaster pieces. Add clay-shrinkage compensation before generating.

Question 3

Why is the mold split into multiple parts?

Accepted Answer

Multi-part shells let you release models with undercuts or complex shapes that a single mold couldn't pull off cleanly. Meshcast adds the parting lines and alignment keys automatically.

Question 4

Is the plaster mold generator free?

Accepted Answer

Yes - free with no signup, running entirely in your browser. Upgrade to Pro for unlimited downloads and a commercial-use licence to sell what you cast.

Plaster Mold Generator — slipcasting mold maker