Infrared invisible marking for high-security concealment and rapid machine recognition; specialized anti-counterfeiting ink for documents, tickets, and cards.

This infrared-invisible, machine-readable ink is colorless and transparent to the naked eye, leaving no visible trace under ordinary lighting, yet it triggers an audible signal when detected by a specialized infrared scanner. Compatible with various printing processes—including screen, flexographic, and offset printing—it offers strong adhesion and is suitable for paper products, plastic films, and labels. The ink forms a thin, fast-drying coating that is resistant to abrasion and solvents; it provides secure, hard-to-counterfeit covert protection ideal for security documents, packaging, and traceability/authentication applications. Environmentally compliant and suitable for stable, high-volume production, it combines covert marking with intelligent infrared verification capabilities.