this post was submitted on 10 Nov 2025
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TeX typesetting
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A place to share ideas, resources, tips, and hacks for Donald Knuths typesetting software TeX. All variants and formats like OpTeX, LaTeX and ConTeXt are welcome.
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I would of course frame some poor sucker by using their color Canon printer. I think all the Canons have the yellow tracker dots.
Otherwise a black Samsung or Oki would perhaps be safest.
BTW, why do you mention laser printers specifically? AFAIK the trackers are generally with yellow pigment, and most laser printers are not color.
is it only yellow dots? I would have guessed that black-and-white printers use single black dots in patterns, which would be invisible for most intents and purposes, too.
It's "to track counterfeiters" supposedly. Only color printers should have tracking dots, but my paranoia doesn't trust that my b/w printer doesn't have tracker dots.
I’m not sure why you would regard black dots as invisible.
The EFF warned that no printers are safe (or something to that effect), as they gave up on the project to document the models with tracker dots. I suppose the question is: have any black laser printers been concretely identified as having tracker dots?
In any case, I think mono printers are safer simply because there is no legit cover story for that surveillance. So if someone gets caught doing something naughty, there would be a more reluctance to use the evidence if it reveals mono printers are compromised. A mono printer maker would have no defense for their anti-consumer design.