In the news

There's two parts:

1. The Printshop will use CMYK in combination to macroscopically approximate the same spectra as the skin spectra. At a Microscopic level- well above particle interaction level- this looks like:
   
   Which means that you are probably not going to get the same reflectance properties as skin, where pigmentation is a concentration dependent deposition of a single pigment, with a single spectra.

2. Diffuse reflectance and scattering. (essentially a change in amount reflected due to multiple biological molecules interactions)

Couple them, and you don't have as close an analogue to skin as you might hope.