How To Make Magnetic Ink For Checks
Can you make your own magnetic ink?
Here [Catarina Mota] is showing off a ring of magnetic ink printed on a piece of paper. By mixing it with acrylic medium in a vortex mixer you end up with a homogeneous ink. ... There's a quick demo after the break that shows how well this printed ring holds the magnet.
Make Your Own Magnetic Ink | Hackaday
Do you need magnetic ink to print checks?
However, the magnetic ink has always been legally required on the check as a payment instrument and that requirement still exists today. According to the Federal Reserve and the Accredited Standards Committee X9 (for financial industry standards), in order for a check to be treated as a cash item, it must contain MICR.
Why MICR Code is Required | Source Technologies
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. A ferrofluid is attracted by a magnetic field but does not become permanently magnetized.
“The chemistry of US currency – Magnetic ink” Sharing chemistry ...