Im aware that ink printers don’t mix ink, but it’s the resolution issue with FDM that makes me think filament blending is the way to go
I’ve been contemplating how to blend the liquid (or near liquid) filament without introducing chaotic flow, which fortunately I have some experience with from previous projects, and in effect I believe that the filament stream could be twisted, it wouldn’t bleed strictly laminar but can be done in a way that can avoid turbidity. It wouldn’t be perfectly “blended”, but with some uneducated guesses I estimate it could get the color resolution down to about 0.08mm.






Some purge would definitely be required, I can’t think of any way around that. But a smart slicer may be able to do all/most during infill.