Q&A for How to Mix Plaster for Sculpture

It would be a safer idea to make a silicone mold of your face first, then to fill that mold with plaster, if your plan is to make a casting. If you use plaster to make a mold, and something goes wrong, you could potentially hurt or suffocate yourself. Silicone, though not completely safe to use, is safer, and could be peeled away from skin much more easily. Please be sure to use silicone that is formulated for mold making, and for prolonged contact with skin. If you are serious about facial mold making, contacting someone who specializes in the field would be a great way to find out how to safely use plaster for this purpose.

Yes, but you have to be careful, as the plaster of Paris square may break, and the sculpture will not be very durable.

It can, but the sculpture will not be very durable and could be damaged by weather conditions.

Yes, you can use water. Put a little bit of water in the plaster every day.

Yes it can. You just have to put a lot of cornstarch in it, then mix. Keep doing it until you like your clay substance.

Don't use plaster because over time it will fade and crumble. Go to a serious art store and get some clay. Clay is really good for sculptures, and if you make a mistake, you can fix it right away. With plaster, you keep everything the same and it dries very fast.

Possibly. It will be durable, but messy and unreliable. Best to use it for large sculptures.