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 ...

Credit: SaVanna Shoemaker / Mashable The Echo Dot also comes in three fairly muted colors (gray, white, and blue), but the Echo Pop is available in some, well, poppier colors (lavender and teal in ...