Every Halloween I make treats to give away.  This year I had two 3D printers at my disposal, so I decided to make 3D printed chocolate mold maker.   I used food safe silicone to cast the chocolate mold from the 3D printed mold form.  Then I cast many, many chocolates.  

The skull is from a 3D scan I created using 123D Catch.  I used OpenSCAD script to make a mashup of a parametric box by Thingiverse user acker, and my skull to create the mold maker.  I also created trays for the chocolates using the parametric box script. 

The candy trays were printed in PLA, so they would relatively "food safe" at least compared to ABS.  I cast many, many batches of white skull chocolates and then placed them in the PLA trays.  I then placed the trays in treat bags and sealed them with twist ties.  

The OpenSCAD code and STL files are all available on Thingiverse (and at later steps within this Instructable):
The Chocolate Skull Mold Maker
Skull with Pointed Teeth (cleaned and repaired scan)

The scan is available from 123D Catch:
My original skull scan (before cleanup)

Step 1: Bill of Materials

You will need the following items in order to recreate the White Skull Chocolates:

- Access to a 3D printer (I used a MakerBot Replicator) or use of a 3D printing service (like Ponoko or Shapeways)
- PLA filament to print on that printer
- Smooth On SmoothSil 940 food safe silicone rubber
- Chocolate Melts (no tempering required) - I like this brand
- Soy Lecithin (softgels) - I found these at Whole Foods in the supplement isle
- food thermometer, I find that digital ones with big letters are easiest to read.
- double boiler (or a tall soup pot and a small glass mixing bowl)
- sharp knife
- cutting board
- small spatula / spreader

Optional items:
- coco power (I used Green & Blacks)
- Candy maker's cotton gloves (keep your fingers from marring the chocolate when demolding)
- Food safe squeeze bottles or a chocolate funnel (keeps the process from becoming overly messy)
- Bamboo steamer (can be used in place of a double boiler or tall soup pot / glass bowl combo)
- Plastic treat bags with twist ties (I bought mine at Joann's Fabrics)
I've never heard of degassing done with a speaker and a toothbrush before lol, but I'm definitely going to try it next time I make a mold. Thanks for the tip :D
:O <br>Not easy, but really cool!

About This Instructable


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Bio: Anna Kaziunas France teaches the "How to Make (almost) Anything" rapid prototyping course in digital fabrication at the Fab Academy at AS220. She is also ... More »
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