Geoff Greer is getting married pretty soon, and figured it’d be fun to make the rings.
I’d seen a Nile Red video where he made purple gold, and the process seemed simple enough: Make a mold, pour some molten metal into it, and voila you have metal in the shape of the mold. It turns out that the devil is in the details.
Since I wanted the ring to fit my finger precisely, and I wanted it to be pure gold, I figured that lost PLA casting was my best bet. The process is similar to lost wax casting, but starts with a 3D printed part instead of a wax form.
I’d 3D print the ring I wanted, make a plaster mold of it, heat up the mold until the plastic melted/vaporized away, then pour molten metal into the mold. After it cooled I’d rinse away the plaster, then cut off the excess metal and polish the ring.
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