4 ms·

some related and useful info: https://www.eff.org/pages/list-printers-which-do-or-do-not-display-tracking-dots https://www.eff.org/pages/list-printers-which-do

• joosters 12y ago
  From the linked 'seeing yellow' site: "They are present in both color printers and copiers but do not show up in pages printed in black-and-white mode."
  • msandford 12y ago
    Because you can't print counterfeit currency with black and white, which is ostensibly the reason the whole thing got started.
    • arobertson 12y ago
      Couldn't you replace the black ink with green ink and then print in "Black and White" mode?
      • msandford 12y ago
        My guess is that you wouldn't get the shades right. Maybe with a lot of trial-and-error, but at some point it's easier to just make some printing plates and go that route. Either way the paper is the real problem.
    • akallio9000 12y ago
      So you could substitute green ink in the black ink container?