Daylight fluo watermarking

Security prints hiding watermarks (texts, logos) that are revealed under the display of a smartphone.


Daylight fluorescent watermarking enables hiding security watermarks within the visual content of a document or of a package. These watermarks remain totally invisible under white illuminations (e.g. daylight, fluorescent tubes, white LEDs). The watermarks can be revealed under a traditional UV-A illumination (black lamp) and also under a blue illumination such as for instance a smartphone displaying a pure blue image.

Use cases

Authentication of governmental documents (ID cards, driving licenses, tax stamps)
Authentication of valuable goods (watches, fashion articles…)
Authentication of pharmaceuticals


Offset, gravure, flexographic with classical CMYK inks and a daylight fluorescent yellow ink
Personalization with inkjet printers