Images: EFF cracks printer tracking code Summary: It was recently discovered that many printers put a code on every document it prints. Now we know what it says. By Bill Detwiler | July 19, 2006 -- 11:36 GMT (04:36 PDT) Follow @billdetwiler Previous | Next Image 4 of 6 show through The ink for the code will show through print. Topic: Hardware Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.