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ANSI X9.100-20-2021
Magnetic Ink Character Recognition - Printing MICR Characters
This standard specifies the shape, dimensions, magnetic signal level, and tolerances for the E-13B characters which include ten numeral characters and four special symbol characters. When these E-13B font characters are printed in magnetic ink and used for the purpose of character recognition, the printed characters become magnetic ink character recognition, or what is commonly referred to as MICR. Also described are the various known types of printing defects and other printing considerations, together with the tolerances permitted.
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