The Finished ProductThe Finished Product

Making a 3D Printed mold is something I’ve wanted to do for a while, but I’ve always been intimidated by the industrial packaging of mold-making material and the steep learning curve involved in its use.

After watching this awesome video by designer Carmelo Nazario, I decided the process was easy enough to try on my own. I used a 3D model of a grumpy frog designed by Cindy Raggo as my jumping off point, and designed a two-part 3D printed mold around it.

The 3D Model UsedThe 3D model used

The mold has two holes drilled in the base; one to pour the material, and one to allow air bubbles to escape. I used Ecoflex 00-20 silicone rubber material to make the model,¬†due to its high level of stretchiness. I didn’t use any dye, which is why the model appears completely colorless and difficult to photograph.

The Two Part MoldThe two part mold

I used a hot glue gun to weld the two pieces of the mold together to prevent any rubber from escaping, then poured the rubber into the pour hole. Once full, I tapped the sides and rocked it back and forth to allow any trapped air bubbles to escape.

It was a little messyIt was a little messy

Removing the frog is pretty straight-forward; just break the mold open and pull it out. Here’s a video showing how I did it.

The final frog was super adorable, and super stretchy. Ecoflex 00-20 is slightly softer than human skin, so it feels very rubbery to the touch.

Final product, top viewFinished product, top view

If you’re interested in making molds and making copies of things, this is a fun way to do it! Be sure to check out Carmelo’s awesome video as a great way to get started!