Dickeson--"Ground Truths," Sound Advice

We deal with processes involving three ink colors: cyan, magenta, yellow. Black we toss in for contrast. We can only print a limited spectral range with that limitation—far less than the human eye can distinguish.

Those inks are "filtering" out wavelengths of white in the paper. The properties of the paper define the color response. This is a limitation on our process we must concede honestly. We don't.