[–] 5541608? 0 points 9 points 9 points (+9|-0) ago
Not a serial number, but an encoded series of colored dots. It usually DOES contain a serial number but can also contain the time, date and size of the print job, which computer it came from (MAC address) and even the title. Thankfully its not every brand, or even all models sold by the brands. But it does appear to be the most common printers used by offices.
[–] 5544662? ago
Seems like ink printers are safe? Or did I miss something?
[–] 5548714? [S] ago
It seems like many color printers are unsafe but black & white printers are safe, judging from all the links people shared.