MICR Toner Cartridges!
MICR Toner known as ‘Magnetic Ink Character Recognition’ is a specialized type of printing for the characters you see at the bottom of checks and deposit slips.
That line at the bottom of a check or on a deposit slip contains information that the bank uses to properly route and process payments. Using a special toner called MICR toner; the MICR font characters are magnetically charged and read electronically by special readers which convert them into digital data. It serves as a deterrent to fraud, because a photocopied check will not be printed with magnetic ink.