Filament is the material we use for FDM 3D printing, and it's pretty easy to ... It prints very well and the shimmer from the gold/red highlights hides any layer lines after it has printed.

Traditional desktop 3D printing technology has effectively ... Between the extruder and traditional heater block, the filament passes through a gold-lined optical cavity where it is blasted ...

This explains the special extruder, since metal-bearing filament is hell on typical 3D printer nozzles ... or titanium for $112. Gold was also an option, but at $6,400, we’ll pass.