This is a core printing standard describing how to properly print the E-13B font characters in magnetic ink. Part 1 gives normative information on correctly printing the shape and giving the magnetic characteristics of the E-13B characters and what print quality issues to avoid. Part 2 informatively describes recommended methods of testing MICR characters to assure they are in conformance with normative specifications given in Part 1. The Part 3 gives normative instruction on the requirements of a MICR reading device and the methods for producing and calibrating secondary reference documents used to measure MICR waveform and signal level.