In "Handbook of photography" on page 634 Olindo O. Ceccarini writes: "It's a well-known fact that the color balance of a blue pigment (spectral reflecting power) is much less than that of a magenta and yellow pigment." Because of this he suggests that - in order to achieve correct color balance - the magenta and yellow bromides need to be printed darker than blue bromide and the magenta and yellow tissues need to sensitized longer (in a one-bath carbro solution) than blue tissue. Is this still necessary today because of the nature of the process, or does for example digitally adjusted negatives offer control that didn't exist in 1939?

I suppose it would be desirable to be able to give equal exposures to the bromides and sensitize the tissues in an identical way but I'm thinking whether the use of a silver gelatin print in the "exposure" of the tissue require the color separation negatives of equal density and contrast.

Maybe this has been posted before, but the book can be read and downloaded for free here https://archive.org/details/handbookofphotog00henn