3 ms·

What about B&W laser printers?

• phire 4y ago
  They typically don't do watermarking. The whole justification was stopping the counterfitting of currency, since color printers can produce quite good results for near zero effort. And you can't really use a b&w laser to print convincing notes.
  • lupire 4y ago
    But now the gov wants to spy more, so they should have light grey tracking dots.
  • deleted 4y ago
    [deleted]
• codedokode 4y ago
  They can use black microdots, I guess? Or some kind of stenography in the printed image.