What is MICR Toner?

The characters at the bottom of a check sometimes referred to, as the MICR lines are the key by which all checks are automatically processed in the United States today. This automated process is based on a technology called Magnetic Ink Character Recognition or MICR.

MICR documents are processed within the banking industry on special reader/sorter machines. The reader/sorters will first magnetize the MICR line, and then read the magnetic signals. Each character, if printed correctly and with the appropriate amount of magnetic chemical (ferrous oxide) in the ink or toner, will give off a magnetic signal to that character.
 

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