- For all currencies, except polymer (plastic-coated) banknotes- Authenticity check: Chemical composition- Simply mark the banknote with the test pen- Light discolouration = genuine banknote- Dark discolouration = suspect banknote- The indicator colour disappears on genuine banknotes after just a few seconds Examples of use:- For quick and discreet checking of banknotes Suitable for:- Over-the-counter retail- Gastronomy- Events and large events