For a theoretically perfect inkjet printer, combining cyan (C), magenta (M) and yellow (Y) inks would produce a perfect black. Combined spectral reflectance of each ink would be sufficient to absorb virtually all visible light such that very little would be reflected back for your eye to detect. Reality, however, is not perfect. Substrates we print on are rarely perfect reflectors, and they typically reflect certain wavelengths more so than others. Likewise, our inks are not perfect spectral absorbers, so the pigments used tend to absorb some wavelengths more than others. When printed in even …