Some manufacturers, like ProtoPasta, create their own masterbatch in house ... as drifting even to 1.8mm in diameter can jam ...

Color gradient filament is fun stuff to play with. It lets you make 3D prints that slowly fade from one color to another along the Z-axis. [David Gozzard] wanted to do some printing with this ...

[Turbo_SunShine] says to just print your own, and experiment away! Now, if you’re thinking that 3D ... “filament” is a hexagon rather than a circle, which helps get consistent results. To ...