Thanks to nanotechnology the human eye can perceive its surroundings in the highest possible resolution.
Now a Spanish startup is looking to nanotechnology to help prevent documents and products from being falsified. The key here: photo-sensitive microparticles. Integrated into ink, they are used to print security features in QR- and barcodes.
As in current methods for bank notes, the code becomes visible under UV light. Exposure to additional infrared light, however, causes the microparticles to change colour again. Confirming authenticity for good.
In a patented process, the particles can be programmed to retain their second colour once the infrared light has been removed, or return to their original colour.
China is focusing on creating a forgery-proof hydrogel instead.
