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Moldmaking and Casting Process by emilySculpts Moldmaking and Casting Process by emilySculpts
Want to see more process photos?  Follow me on Instagram!

Please note, this is just an overview of some of the major steps of my process.  I just wanted to give you a peak into what I do and maybe get some ideas running in your head. 

I have no current plans to do full on molding and casting tutorials, nor do I have the time to explain my process to individuals.  However, if you are interested in molding and casting, Smooth-On offers TONS of free tutorials on the subject.  They are the best in the biz and can explain things WAY better than I could anyways.  Check them out here.

(Explained from top left to bottom right)

- My original was made with a 50/50 mix of Super Sculpey and Sculpey firm over a wire and foil armature.  Nothing too out of the norm here.  However, sculpting for molds is a bit different than regular sculpting as you have to think about things like undercuts and how the resin will flow into the mold.

- I use Smooth-On’s Mold Star 15 silicone for my molds.  It is mixed 50/50 by volume so no weighing is necessary.  It has great tear strength and creates a very permanent mold that can hold up to countless pulls without degradation. 

- My mold boxes are created with 1/4” masonite that I cut down to fit my needs.  I use hot glue to seal the boxes.  I use a non-sulfur oil based clay for the shim, which creates the part for the mold.  It’s been a while since I bought this clay, but I believe it is Chavant Medium.

- Keying is essential for a two part mold like this.  It locks the mold into place to ensure that the resin doesn’t leak out.  I use the wood handle of a paintbrush as well as a metal loop tool to create keys in the shim.

- I often have to modify my molds once they are cured.  I am seen here widening a vent that helps air escape from the mold.  Allowing air to properly flow helps prevent bubbles in the casts.

- I cast using Smooth Cast 320 resin.  It is a myth that casts come out of the mold perfectly.  That couldn’t be any further from the truth.  Seam lines must be sanded down and air bubbles have to be filled in with putty and sanded.  

For those that are interested, I will have several painted casts of this guy as well as some blank paint-your-own’s available sometime after Thanksgiving.


Want to learn how to sculpt like I do?

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Submitted on
November 26, 2013
Image Size
1.4 MB


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