Sharpie enhanced Natural PLA test prints.
I colored the PLA with different sharpies in 6in segments alternating with uncolored segments.
Going from left to right:
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purple. Just barely visible. Single shell. Not thick enough to get good color.
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the end of the purple fading to natural then blue. The blue stains PLA very nicely. Double shell.
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end of the blue, uncolored, then purple coloring only one side of the filament.
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half blue, uncolored, full orange, uncolored, full light blue.
Conclusions: sharpie coloring works well. Color is more visible when doing more ink (obviously) or with a double shell. Darker colors show up better.
I have not tried striping or mixing colors. That’s for next time.
