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Mold Making

Last week I went to visit a friend in Albuquerque and pick his brain about how to make molds for soap and resin casting.  There was a LOT of information all at once and I’m still organizing it in my mind.  Here are some of the photos I took during the workshop.

I have workshop envy

This is the shop where he makes his molds.  Lately he’s been moving more into metal casting than resin, and one March (this year or next) I may come to a metal-casting workshop.  In the back notice the very large mold of the very, very large horny-toad.  I loved that sculpture.  On the back wall there is also a nice mold of the classic archaeopteryx fossil.  I would have taken a casting of that if I’d had space for it in my luggage.  As it was, I barely fit the molds I made myself plus the LARGE quantity of hot green chili I brought back.

 

 

 

 

 

Platsil 73-25 2-part mold silicone. And Nathan’s cool tray to allow it to pour more easily.
Vacuum de-gasser. We only used this once but I think it did reduce bubbles in the silicone
Some molds poured, other forms waiting to be set up.
Shapes glued down and ready for the mold form to go around it. I used cups or PVC for the round ones and foam-core board and hot glue for the rectangular one.
Lizard on a bed of clay ready for mold material to be painted on. This will be a 2-part mold.

 

 

Completed molds are trimmed and dusted with talc so they don’t pick up dust and dog hair.
Nathans epic $100 variable temperature glue gun. The glue sticks are a foot long and 1cm wide.

 

Completed chess mold after the 3D printed original was removed.
Heating wax to pour a shape that can be sculpted more
The final array. Everything I brought back with me: molds, originals, casts in resin, wax and plaster, extra wax and some new sculpting tools.

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