Versaink MICR Black pigment ink, containing magnetic nanoparticles (50nm) for magnetic content scanning, extreme light and water fastness, rich optical density and ever-lasting document integrity. Indefinitely stable (no agitation required), water-based, eco-friendly (Ames negative) and compatible with a variety of porous and non-porous paper and non-paper substrates. Applications include magnetic tagging of substrates, printing of money orders, checks and magnetically scanning content such as barcodes and patterns.