Secure Windows
Louisenthal’s pioneering spirit has produced a major – and exclusive – innovation: a transparent window with a striking color change from gold to blue. It allows users to verify the note from front to back – and that’s an industry first.
This front-to-back verification encourages the public to check both sides of the banknote, making it possible for them to identify the authenticity with ease. Our varifeye® security windows can be combined with foils in multiple metallic effects, resulting in a unique look that users can recognize instantly. As well as the window, they see the hologram, micromirrors, 3D elements or other design below, which can also change its size or shape depending on the viewing angle.
varifeye® ColorChange (Stripe)
The innovative varifeye foil is the most prominent basis for security features on a banknote. This key function is primarily supported by an ingeniously designed translucent window and a brilliant main motif with highly impressive color change effects.
varifeye® ColorChange Patch
Louisenthal’s state-of-the-art patch technology saves space on the banknote while enabling unique designs and instant recognizability. Our patches can be applied with different application systems.
Our latest customer projects with foil elements from Louisenthal
New security features for Oman: The Central Bank of Oman is a finalist for the IACA Awards 2020 in the category "Best New Currency Feature or Product" with our varifeye® ColorChange Patch
varifeye® ColorChange Patch – front
varifeye® ColorChange Patch – back
varifeye® ColorChange Patch – back with transmitted light
The new somoni note series for Tajikistan with security features by Louisenthal.
varifeye® ColorChange – front
varifeye® ColorChange – back
varifeye® ColorChange – transmitted light
Milestones of Success
2018: Secure window varifeye® ColorChange Patch
We released our varifeye ColorChange technology as a patch for use in all types of application types and substrates. This was the world’s first window patch product for banknotes, proving Louisenthal’s pioneering credentials once again.
2017: varifeye® ColorChange secure window
In 2017 Louisenthal innovated again with a new version of varifeye. The window, combined with the foil, provides front to back verification as there are different motifs on each side of the note and the color changes from gold to blue. Louisenthal proves once again that it’s a trailblazer!
2005: varifeye® secure window
In 2005, Louisenthal brought a completely new product to market with the launch of varifeye, a transparent window embedded in the paper that’s ultra-secure, fascinating and easy to authenticate.
