Central banks use specialized high-value ink for banknotes

Central banks utilize highly specialized, expensive inks for the production of paper currency, including the Dollar, Euro, and Turkish Lira. These magnetic and bio-protected inks are among the most valuable liquids in the world, with costs reaching hundreds of thousands of dollars per liter.

Beyond preventing counterfeiting and piracy, the ink contains a specific 'biocidal' component. This acts as a biological shield that protects banknotes from mold, bacteria, and fungi that thrive in moist environments and through frequent human contact. Without this protection, physical currency would degrade and rot within months due to microscopic organisms. The exact chemical formulas are treated as state secrets and are produced by only a few major companies under strict security protocols.