what type of chemical differences between different hues exist that would have an impact of ink density printed on paper. I.e. yellow vs. blue vs. black. I'm trying to figure out the practicality of printed information in solid blocks of background color with a distinguishing color for text on top so that the text would not be distinguishable from the background color under an xray.
black
o.O thats not an answer, and the scheme would require at least two colors chemically consistent enough to have the same x-ray profile to have a solid background with text overlays in a different color not show any differentiation between the two in terms of xray opacity.
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