Nano-Ferrofluids in function as MICR Ink for the Inkjet Printing
Magnetic fluids made of magnetic material (subdomain nanoparticles) dispersed in a solution so that an agglomeration of the material particles is excluded even under the effect of an external magnetic field. This is ensured by a corresponding coating of the particles. If a magnetic field is applied vertically, they take almost the character of solids. Steadily growing the economic value of nanomaterials consisting of particles. smaller in at least one dimension than 100 nm. The latter are located outside of magnetic fields in thermodynamic equilibrium.
When it comes to print applications for security purposes, such as the printing of the MICR line of bank compliant checks, so it depends mainly on a precise adjustment of the particle size of the magnetic material at the nanoscale. Two parameters are decisive: the nozzle size of the inkjet printheads on the one hand, and the signal strength as required by the magnetic check reader on the other.
In the preparation of such special magnetic inks, we have many years of experience. Our inks are formulated so that they are tuned precisely to the high-performance digital MICR cheque printing, which in many countries, especially in the US, UK, Australia and India continues to play a prominent role. Approximately 90% of the use of magnetic ink is aimed at the production of bank cheques and payment and remittance documents. It is about the fulfillment of the MICR safety function (MICR = Magnetic Ink Character Recognition). The remainder is in the production of vouchers and insurance policies.
Lastly, the most important consideration for evaluating our MICR ink solution is that our MICR ink is both de facto and de origine universal in the sense that it harmonizes with all printheads and machine types, which in the entire inkjet market (whether office or high speed production). occur, without problems. This can be said with almost logical certainty. Namely, the metal nano particles, colloidally dispersed in the ink, are so small (20 nm-1 nanometer = 1 billionth of a meter) compared to the nozzles of the printheads used in the commercial inkjet systems, that physical damage or even deterioration of these functional elements is completely eliminated. At the same time, the MDT MiCR ink is absolutely neutral in pH, so the question of a possible chemical interaction of the MDT MICR ink with the printheads of inkjets can be negated also a priori.
Example of a Japanese cheque with MICR line
In order to process large quantities of cheques automatically magnetic readers are useful. This is the reason why magnetic ink is required to print cheques. At the end of them have to appear rows of magnetic signals emitting characters.
MICR INK – UV curable
Many inkjet printers now have so-called UV print heads. These are designed to dry or cure the respective inks
In the production of magnetic special inks, we have many years of experience.
Mips Dataline offers magnetic fluids mainly designed for two functionalities,