Life Casting – Negative Creating & Silicone Running

11 Nov

Today I went into uni to catch up with my SFX work, having been off for work experience. Today I created my negative over the sculpted clay, to finish my mould and run my silicone piece.

Below you can see my finished sculpt, the top clay half is my primary piece, the lower half is a back up piece incase anything goes wrong with the top part.

To create the negative mould, we carried out the same steps as doing the initial life cast, only this time, we already have the facial mould to use. Check back through my earlier SFX posts to find more in depth details about this procedure, heres a quick run through –

1. Create the clay/modrock wall and cover the interior in Vaseline.

2. Fill with plaster, using a double skrim layer for support.

Clay/Modrock Wall

Clay/Modrock Wall

Creating the Plaster Negative

Creating the Plaster Negative

3. Allow to set for approximately 15min, then break open. remove all clay and particles from the interior to ensure the shape of the silicone run is not altered.

Plaster Negative

Plaster Negative

4. Once this has been done, we are ready to run! Place the mould on a stable horizontal surface, and pour in the silicone. Place the first part of the mould (the positive side) within the negative. Those holes we drilled earlier will help get positive to negative positioning correct. Silicone will run out the sides so watch out. Place a small dab of the silicone on top of the mould to help determine if the silicone has set.

Time to pour!

Time to pour!

Running the Silcone

Running the Silicone

5. After about 45min, it’s time to break open! You’ll have to come back next week to see the silicone piece!

Breaking Open!

Breaking Open!


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