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For a character that I want to portray in different stages of their life, young and older age, I think a good direction might be to sculpt the head in plasticine clay and then make a mold from which I can melt more plasticine and replicate another time or two. Having the original sculpt replicated in clay will allow me to adjust the features, add wrinkles and signs of age, while maintaining the same sense of one person. I would then make an ultra cal mold of each clay sculpt to later cast in silicone.

I have never tried this before so I wanted to see if anyone has tips/suggestions. What material should I make a mold of the clay sculpt with, that will allow me to pour the heated chavant clay into? A silicone mold?

Any tips are appreciated, thanks.

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I'm taking inspiration from seeing something similar here: https://www.tomandhani.com/single-post/2016/04/02/making-silicone-p...

The silicone mould. as shown in your link, should work very well.  I used to use dental alginate - same stuff used for making actor's face moulds - for a quick temporary mould that is flexible and can be removed from each cast without smushing the plasticine.  I melted plasticine and poured it in, just as you plan to do. But it is good for one cast, two if you are lucky, then it shrinks or tears.  If you want to cast several plasticine duplicates from the one mould, silicone is the better way to go.

I mostly use Pinky Sil for small moulds, it is a quick setting platinum cure silicone. There will be other brands where you live.

Not all plasticines pour well when melted, but Monster Clay does, and it is sulphur free so it is good for using with platinum cure silicones.

Hi Evie

I have done exactly what you describe for one of my characters, and it worked very nicely. I made a silicone mould in one block, then cut through the back of the head to release the clay sculpt. When pouring the Chavant, you need to have it pretty hot as it solidifies quickly. I imagine one could prod it down a bit with something like the handle of a wooden spoon to ensure the cavities are filled. I wasn’t too bothered, as I was sculpting an older face anyway so could sort out any blemishes.

I used Platsil 25 for the mould as I wanted it to be fairly solid.

Thank you for your reply! I appreciate your input and help.


StopmoNick said:

The silicone mould. as shown in your link, should work very well.  I used to use dental alginate - same stuff used for making actor's face moulds - for a quick temporary mould that is flexible and can be removed from each cast without smushing the plasticine.  I melted plasticine and poured it in, just as you plan to do. But it is good for one cast, two if you are lucky, then it shrinks or tears.  If you want to cast several plasticine duplicates from the one mould, silicone is the better way to go.

I mostly use Pinky Sil for small moulds, it is a quick setting platinum cure silicone. There will be other brands where you live.

Not all plasticines pour well when melted, but Monster Clay does, and it is sulphur free so it is good for using with platinum cure silicones.

Thanks so much Simon, very helpful to hear! 

Simon Tytherleigh said:

Hi Evie

I have done exactly what you describe for one of my characters, and it worked very nicely. I made a silicone mould in one block, then cut through the back of the head to release the clay sculpt. When pouring the Chavant, you need to have it pretty hot as it solidifies quickly. I imagine one could prod it down a bit with something like the handle of a wooden spoon to ensure the cavities are filled. I wasn’t too bothered, as I was sculpting an older face anyway so could sort out any blemishes.

I used Platsil 25 for the mould as I wanted it to be fairly solid.

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