Friday, May 18, 2012

How To Make A Simple Silicone Mould

Mould Star 15 is a nice general use silicone. Follow instructions carefully. The RICE is used to for when you need to test volumes of material (silicone or plastic). For example, if you are trying to figure out how much silicone you need to make a mould, you can cover the object you want to  mould with rice, then pour the rice out and measure how much rice it took. Then use that volume to figure out how much silicone you need to mix. You can also do this when you have a mould, and want to know how much plastic to mix. **This is a great way to make sure you aren't wasting materials, which can get expensive over time. Just make sure you've shaken out all the rice before making a mould or pouring in plastic!

Work on a piece of clean, smooth, hard board. Cut dam pieces out of foamcore. Hot glue the pieces into a frame. Make sure there are no holes for the silicone to run out. Just use lots of hot glue for this. You can also always pack a bit clay on the outside of the mould, if you notice it is leaking.

The dam height is about 1 inch higher than the logo being moulded, so as to not waste silicone. By the way, the original sculpt is from Super Sculpy (use the grey stuff if you can find it, the peach stuff sucks). It was glued down with a bit of hot glue but not much, because you need to pop the sculpt off later.

With the silicone mixed, start with a detailed coat, being sure to cover all bits with silicone.

The further away you are as you pour, the better. This allows for any bubbles to pop as it makes its way down. Pour carefully and slowly, keeping the silicone in one place and letting it fill up.

You now have an above ground swimming pool. Set the mould somewhere level, and where you can leave it undisturbed while it dries. Bubbles will rise up, pop them by blowing on them with a straw. Don't inhale. No need to put this in a vacuum pot, provided you follow the instructions carefully. After it is dry (follow the instructions), break off the dam walls, use a long blade to carefully cut under sculpt to separate it all from the board. Carefully start peeling the mould off from the sculpt. There you go! Start with something simple, and small, with no undercuts. Don't expect the first one to turn out great, but learn from it, and try it again. If you have to.

You will then be able to pour liquid plastic or plaster into the mould, and make cast after cast. Use a bit of baby powder in the mould to help it release nicely from your casts. This cast is plastic, and is tinted with a green "black light" paint, that glows like crazy under the right light. So you can have lots of fun making coloured casts. As for the zombie, he's a Mad Lab employee who was happy to help us out on the photo shoot.Thanks to the incredibly talented DANIEL BAKER, master of all things monster-making,  for schooling Mad Lab (so that Mad Lab can pass it along to YOU, dear reader).

1 comment:

  1. Great result! Once I did silicone tubes, and I had so much fun! One day I'll try to make a molde