For further information, or to share your findings, please visit us at. If you don't have the necessary equipment for a particular step, go on to the next one. In this instructable, we'll describe three different ways to see the tracking dots your printer produces: with a blue light, with a microscope, or with a scanner.
These codes reveal which machine produced a document and, in some cases, when the document was printed or copied.
Most color laser printers and color copiers are designed to print invisible tracking codes across every single printed page of their output. Sounds like something from a spy movie, right? Unfortunately, the scenario isn't fictional. Imagine that every time you print a document, it automatically includes a secret code that could be used to identify the printer - and, potentially, the person who used it.
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