During bank notes printing they use dyes with magnetic properties that appear after adding some ferromagnetic components into a dye. Such a dye can be detected by means of magnetic image visualizers or by testers with magnetic head. They often print serial numbers or fragments of metallographic picture with a magnetic dye.
Discover how the DC-5100 UV/MG banknote detector spots counterfeit cash in under a second. CE-certified, multi-currency, built for banks, retailers and cash offices.
