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Definition of MICR
1. Magnetic ink character recognition (MICR) toner is the type of toner that can be magnetized so that a specialized reader machine used in places such as banks can translate the magnetic information into characters.
For the bank reader machines used in North America (and many other countries worldwide) the bottom line of a check must be printed in this magnetic ink. The American National Standards Institute (ANSI) has developed the standards we use today for all MICR toner, which include requirements for MICR fonts, toner adhesion, MICR registration, toner signal strength, moisture content, and paper grain.