UV Glow Is Not a Security System: Layering Visible, Fluorescent and Infrared TIJ Codes
UV fluorescent ink is not automatically a security system, and infrared ink is not automatically better. This article shows how to layer visible logistics codes, field-check UV marks and headquarters infrared serials on TIJ lines: choose readers before cartridges, treat glow as only the first layer, and inspect hidden printheads harder than black ink. Includes a supplements packer that issued the wrong lamps, then split UV and IR by role. For brand-protection and plant teams designing a stack they can run.