Wait… what…

Lost Wax Castings. Humans have only been using that tech for a few thousand years. Make a piece of jewelry out of wax. Coat it with liquid ceramic/clay. Bake it so the ceramic/clay hardens while the wax melts out. This leaves a hard hollow shell. Pour molten gold, silver, tin, aluminum, etc. into the shell. Let it cool and break away the ceramic/clay and you have metal jewelry in the shape of the wax. The only modern twist is at the 27sec. mark where he's using the little vacuum pump on the ceramic liquid to remove air bubbles. Then pours the slurry over the wax pieces. At the 40sec. mark he uses the vacuum pump again to remove any air bubbles trapped around the wax when he poured the slurry. Automotive companies use a variant of this where in stead of wax they use Styrofoam. On some models of automobiles, If you look at the engine block or other engine parts, you can see the surface texture of Styrofoam cast into the metal.

We're Flying out now

Looks like they made the mold out of plastic and plaster. The tube they put it in was pulling a vacuum to remove all the air from the plaster, then they put it in a kiln to cure. the plastic burned away either in the kiln or when they poured in the molten metal.

Insane.

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We have tens of thousands of people in america (many are Hispanic/Latin immigrants) that can do this already… They just charge a little more money to do it. This isn’t about skilled labor, it’s about cheap labor.

Lost - wax casting. It’s still how we cast jewelry.

Lost wax casting has been around for a very long time.

This is why we need H1B visas

Investment casting, lost wax

Fake Gold?