As a variation on bronzeFill copperFill is a true stunner. Now you can print with copper on your desktop 3D printer! The true value of this PLA/PHA based 3D printing filament comes to light when you sand and polish your print. It transforms from a red-brown clay like print into a work of art. With the added weight of real copper in the filament, copperFill is the perfect material for statues and other mementos that need to have a non-printed look.