Nathalie Creste and Claudia Schwendimann
In 2015, based on an amended legal basis, the laissez-passer issued by the European Union made a giant leap, from...
This article focuses on the innovative optical technology SPARK®, designed for front-line authentication required for level one protection. The cutting-edge technology - encompassing patented...
An optically variable feature composed of grids that diffract light. This allows various images and effects to be generated, including colour changes (shifts) and...
