You said "A dot gain of 15 on a 50 is pretty extreme."?
Actually , it sounds just about right if it's on a gloss coated paper.
ISO 12647-2:2015 states a Tone Value Increase (TVI) of 16% for gloss coated paper. This uses conventional Murray-Davies (N=1) formula.
You mentioned a business form, so...
The "science/math" is to use either the CIE hue angle (h') or the wavelength in nanometers (nm).
The bigger issue is the subjective/personal definition of "orange."
I would fan out the Pantone book and "find" your range of orange colors, then measure the start/first and end/last to get h' and...
The dot gain (tone value increase TVI) is a simple fix with a CtP cut-back compensation curve.
Returning back to the original problem of ink not drying, do you have an Ink Film Thickness gauge to test IFT on metal oscillator roller?
You mentioned a water based "varnish". Is it really a...
The Fogra Media Wedge just contains known screen tint percentages.
When comparing to some target aim, you need the Lab values for that CRPC (Characterized Reference Printing Condition), Fogra 39 is for gloss coated paper (type 1&2), Fogra 47 is for Uncoated paper (type 4).
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