How Can We 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.
Laser Printing, Magnetism, and You - Digital Check
How do you make magnetic MICR 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 makes magnetic ink magnetic?
A strong magnet, such as a neodymium magnet, can be used to demonstrate the magnetic character of US currency. A ferrofluid is used in the manufacturing of the magnetic ink. A ferrofluid consists of collidal particles (nanoscale) composed of iron(II) and iron(III) compounds such as FeCl2 and FeCl3.
“The chemistry of US currency – Magnetic ink” Sharing chemistry ...