Mould making

So for contemporary art practise I wanted to make casts of a balloon, at this point I'd tried making my own moulds in my own way. I'd tried making moulds at home with different things that I had in the house like old tupperwares and bits of cardboard to make walls. 

This time I did with proper things that Siobhan brought in for me to use, I covered half the balloon with clay, which I had already filled with plaster so that it was hard. Because I was making a mould of something that was small a soft it was hard to take a cast of it which is why I filled it with the plaster, so that at least it was hard.  

Registration marks

Once I poured the plaster in the sides, it all started to leak, but there was still enough plaster in the mould we fill it to set over night.  

This is the next one that I made, but this one had smaller sides and didn't leak. I again left it over night and removed it from the other half the next morning.  It was really hard to get it out of the mould.

I've tried using the mould with wax, clay and latex.  The wax broke at the knot, the same as the plaster cast's I made. The clay balloons worked for doing half a balloon cast but I wasn't that happy with how they looked. The latex took a long time to cast, I did one by pouring the latex into the mould right to the top. This didn't work, the outside set but the inside stayed as liquid.  I tried doing it in two halves and building it up in layers.