Polymer Banknotes (IMAGE) University of Sheffield Caption The banknote picture demonstrates how these colored polymer materials can be made into robust layers that could be used as anti-counterfeit measures on banknotes. Credit University of Sheffield Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.