Filled ink jet cartridges; Ink cartridges, filled, for printers; Toner cartridges, filled, for inkjet printers; Toner cartridges, filled, for laser printers; Toner cartridges, filled, for printing machines; Toner for photocopiers; Toner for printers

Nano material-based ink that changes color upon placement of a magnet or magnetic field, which can be directly printed on products, packaging, and inserts to verify that a consumer product is authentic