Universal Filament Colorizer

A simple filament dyer that should work with most filament sizes and printers. Uses a standard Sharpie permanent marker (other brands should work, as well) as a pigment source. The simple design allows for easy changing of markers mid-print and won't interfere with a print, allowing you to keep the Colorizer on at all times even when not using a marker.

Prints easily with no supports. Simply supply a rubber band of appropriate size for the marker you are using. I recommend using a mini permanent marker if your printer is enclosed to ensure it won't hit any walls and cause print errors. As with all pigment systems, it's recommended to "flush" your nozzle with un-colored filament every so often to prevent jamming. Simply printing a model without the markers in should do the trick.

I've also included a filament_colorizer_double.STL file that allows for the use of two markers for more even pigment application (with only one you get a sort of directional coloring effect that can actua