cool video on using a single-extrusion printer to make multi color prints.
You make a separate print file for each color, each one only 2 layers high, then print them one after the other without removing them from the print bed.
I don’t know any of the apps he was using, so I used what I have on hand:
Color separation with Pixlr online photo editor, AnyConv to convert that into STLs, Tinkercad to edit and make sure they lined up (I wonder if I could skip that step?), AstroPrint slicer, and my beloved Ender3 to print.
Here’s my first try; I started with a simple line drawing in black and white, added color, then separated it into four files: black, pink, green, and white, and printed them in that order.
If I were to do it again, I would make the black outline thinner; can’t do that in Pixlr, and I was too lazy to turn on the desktop with Photoshop, which would have done a better job, easier.
The green didn’t print everywhere it was supposed to, and those black spiderwebs at the top were some loose threads I didn’t notice until it was done. Overall, I’m happy with this first attempt, and if I ever come up with a use for the technique…