Topic: Liquid colorant?
Has anyone tried to use a liquid colorant, something like using the Rit dye or even food coloring?
The reason I ask is I see there are various colors to add and mixing has come up. (DePartedPrinter is doing a bang up job with all that)
With a liquid you could inject it further down the tube and even use a stepper driver to control the flow. This would mean less filament used when changing colors and the ability to blend your own colors before hand to a more exact standard.
If you could get an injection point just before the nozzle you could swap colors every few feet. Probably would need some clever mixing nozzle at that point though.
Multi Injection points could give CMYK control, but I think I'm getting ahead of myself there.
As I still haven't got round to building a filament extruder yet I can't test anything but I would be interested to know peoples thoughts.