In the [Teaching Tech] video the PolyDye technology is demonstrated, which currently involves quite a few steps to get the colored 3D model ... getting a bit of an ink shower.

There are plenty of ways to color Easter eggs, from onion skins, paint, magic markers, food coloring or alcohol ink.

Investigate a variety of black ink markers, and find out why they look black. Blank inks are usually mixtures of a variety of colored ink pigments in liquid solvents. Chromatography is a technique ...