
Security papers and Secure QR codes

LehMo-Flo Security Paper
Natural Light
UV-C Light
UV-A Light
Blue light + Filter
When viewed under natural light, the security paper appears like a standard document with no visible security features. However, under UV light, its fluorescent properties reveal embedded security marks, showcasing how our pigment-integrated paper provides enhanced anti-counterfeiting protection. Invisible under normal conditions yet detectable in the whole range of UV light (from UV C- UV A). With the use of an optical filter, the printed security marks can also be detected under visible light such as blue or green light. This solution is ideal for secure documents. In this example, the random fluorescent dots are visible under UV C, UV A and blue light (with a filter) but not in natural light.

Invisible patterns on paper

Natural Light
UV Light
Natural Light
UV-C Light
UV-A Light
Blue Light + Filter
With our special ink, we can print invisible patterns to act as background on documents such as IDs, passports, certificates etc. The printed patterns are visible under UV light and also when illuminated by blue or green light and viewed through an optical filter.
Invible Secure QR codes
Natural Light

UV Light
While QR codes are increasingly used as an anti-counterfeiting measure, they remain vulnerable to manipulation and copying. To address this concern, we offer invisible QR codes for enhancing product security. These QR codes are designed to be readable only under special lighting conditions and display a unique color that is challenging to replicate.
This video shows invisible QR Codes revealed by blue light and a filter on the Smartphone camera
Unique security features
Our unique secure QR codes and papers protect your products from counterfeiting —bringing security and innovation together
Security papers contain embeded luminescent features that emit different colors when illuminated by UV or visible light
Secure QR codes that are readable or scannable under UV and visible light
Secure QR codes reveals unique color under UV and visible light