Techkon SpectroDrive Manual page 54

Measure – InkCheck (ExPresso Pro)
Densitometric values are a direct measure for the ink applied on the paper. They
are very process-related, although they are relative values only. Colorimetric values
as recommended in print standard ISO 12647 are absolute values, but they are not
suited to use them for handling the printing process.
Thanks to the spectral measurement technology of SpectroDrive, the very useful
"InkCheck" function combines the best of both worlds: Spectrally based recommen-
dations how to set the ink keys as used from density in order to meet colorimetric
targets required for printing within ISO standards.
Page 54 Manual TECHKON SpectroDrive Chapter 3 – How to use SpectroDrive
In this case there is too much yellow ink
applied in ink zone 7. In order to achieve a
lower DE, the density has to be reduced by
0,10 from D=1,42 to D=1,32. That reduces
DE from 3,8 to 1,78.