How is 3D Printing Filament Made? by stldenise@gmail.com (Denise Bertacchi) from Tomshardware on 2024-10-05 13:00 (#6R8AY) We toured several 3D Printer factories, including Prusa Research, Printed Solid, Printerior, and ProtoPasta, to learn how 3D Printing filament is made.