Well, the way to tell is for someone to get some clear plastic and print some yellow on it, and report. Probably wouldn't hurt to print a whole bunch of colors, then post pix of it with various backgrounds and stuff...
Cheers! Rich
Of course, to show evidence for the original assertion - that the pigment itself would "pass yellow light," you would have to place on that clear plastic nothing but the yellow pigment itself - no carrier or solvent. In other words, a layer of pure pigment.
Bob M.
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