Quote Originally Posted by Photo Engineer View Post
As an OTOMH guess, if those are Status D densities in paragraph #4, this indicates a relatively high level of cyan and magenta impurity in the blue region and thus somewhat unsaturated colors. The high level of K correction indicates narrow dyes at the same time. Am I correct?

PE
Yes, you are correct regarding the Status D density readings. The spectral impurities characteristic of color pigments limit their saturation values. The UltraStable black layer (a pigment, not a dye) is used primarily to provide additional density and detail in the shadow areas and not for color correction.