Then came the tricky part. I had to make sure that the shapes didn't get stuck to bad in the plaster. Here is a picture of me using a spoon to gently break the almost dry plaster off the mask.
Here you can see the mask is free, but I left it in the plaster to make sure that the plaster got the right shape.
Here is the mould by itself. The plan is to pour liquid plastic into the mould and then be able to make masks for the children that they can paint and have fun with.
I am rather proud of this as I have never done anything like this before. I now know a lot more, so I hope the next similar project will be easier. I am looking forward to trying to make plastic masks soon, but I will wait to make sure that the plaster is completely dry and also paint it to try and make sure that the plastic coating doesn't stick to hard to the plaster surface.