? ?Magnetic Ink is a special Anti-forgery Ink that contains magnetic substances (such as iron oxide black and iron oxide brown needle-like crystals) that are magnetically arranged after being treated with a magnetic field to obtain high residual magnetism. Patterns or logos printed with this ink can detect magnetic signals with a magnetic detector, and realize the recognition function through the friction of the automatic processing device. Information such as passwords printed with it can be read by a decoder. Magnetic ink is widely used in the classification, retrieval, and identification of bank notes and postal services. Such as coins, bank cards, credit cards, monthly passes, air tickets, high-speed rail tickets, bus tickets, etc. It is also used for special packaging and printing of trademarks, self-adhesive labels, cartons, tobacco, alcohol, medicine and other commodities.
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