TIJ 2.5 HP SPS print cartridge (C8842A and compatible with HP 45 51645A) filled with VersaInk-nano Invisible Infrared NIR Absorbing 820nm Ink specifically formulated for high-speed industrial and commercial specialty print systems (SPS). | Invisible Infrared Ink is transparent at visible wavelengths, but appears dark or black under an infrared camera lens. | Invisible Infrared ink offers high absorbance intensity in the near infrared (IR) light range. Available in 820nm, 970nm, 1070nm light ranges | Ideal for “stealth” tracking (1-D and 2-D barcodes), invisible marking, security applications, anti-counterfeiting, product security and brand protection, art and design.