Part 4: TVI is not measured it is calculated from density which is king. All the other values our modern densitometers display are simply calculated values from the densities the instrument measures. In short, all a densitometer does is transmit a predetermined amount of light and then measure how much comes back to the instrument. This is done through Red, Green and Blue filters so the instrument can tell if the light was stopped by Cyan, Magenta, or Yellow ink.
One reader made a comment at JimRaffel.com that density is also a good indicator of ink film thickness on a printing press. Just remember that two inks with different pigment loads can record the same density and have different ink film thickness.
Coming next…Part 5 Measuring TVI of Inkjet proofs in meaningless
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