On a related note: many colour printers leave a tiny encoded pattern on each page (based on model/serial/etc), ostensibly to help track counterfeiters. [1] [2]

On a related note: many colour printers leave a tiny encoded pattern on each page (based on model/serial/etc), ostensibly to help track counterfeiters. [1] [2] Unfortunately, they're printed all the time. [1] https://www.eff.org/pages/list-printers-which-do-or-do-not-display-tracking-dots https://www.eff.org/pages/list-printers-which-do-or-do-not-d... [2] https://www.eff.org/issues/printers https://www.eff.org/issues/printers