If you have a UV flashlight, these dots are visible with decent vision.
And of course we have to include the Wikipedia entry:
And of course we have to include the Wikipedia entry:
> (Added 2015) Some of the documents that we previously received through FOIA suggested that all major manufacturers of color laser printers entered a secret agreement with governments to ensure that the output of those printers is forensically traceable.
> This list is no longer being updated.
https://www.eff.org/pages/list-printers-which-do-or-do-not-d...