Had the experience of poking at tracking dots recently for circumstances I won't share here.
Do y'allself a favor and get a blue LED flashlight and point it at a color print. It's shocking how many are printed. It looks like a spattering of sand across the entire page!
Are we talking about laser, color laser and/or ink printers?
I'm surprised there's not been a class action against printer manufacturers for all the extra yellow toner that's been used.