How To Make Micr? (magnetic Ink)
If you tried to make a MICR Inkjet cartridge, all the magnetic particles would simply settle to the bottom, and you'd be left with regular ink. So the right kind of ink simply is not available. ... It is even possible to buy MICR toner cartridges specifically for check printing.
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How do you make magnetic ink?
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MICR characters are printed on documents in one of the two MICR fonts, using magnetizable (commonly known as magnetic) ink or toner, usually containing iron oxide. In scanning, the document is passed through a MICR reader, which performs two functions: magnetization of the ink, and detection of the characters.
Magnetic ink character recognition - Wikipedia
What is MICR toner made of?
It is used primarily for printing specialized font at the bottom of checks to be read by high-speed, magnetic sorting machines. The key ingredient that gives MICR toner it's magnetic charge is iron oxide. The Federal Reserve instituted MICR toner printing to make check-clearing processing more efficient (Source).
WHAT IS MICR TONER? - Print.Save.Repeat.