Demetallized threads offer high contrast and resolution
Demetallized security threads are characterized by transparent areas on a metalized foil surface. These transparent areas communicate information to the observer viewing the banknote or security document through transmitted light.
The process of demetallization ensures optimum contrast and high resolution, and is inherently secure. The large range of design options ensures that a thread is unique for a denomination and serves as a fortified barrier against counterfeiting.
To further enhance the security of the thread, demetallized threads can be equipped with covert security features. These include magnetic, machine-readable properties, electrical conductivity, or elements visible under UV or polarized light.
See also Covert Security Features