How It's Made Acrylic Awards

Wait, the mix monomer with polymer? I'm not sure that's correctly said.

The highlight here comes about 3:00 in when they carve the acrylic cube into a sphere by making shaping cuts on the huge lathe. Just watching the acrylic fly off of the lathe before the award is etched.

How does the laser beam carve inside the alrylic (4:20)?