Michael Haas and Manfred Drusgala (IMAGE) Graz University of Technology Caption Michael Haas (left) and PhD student Manfred Drusgala demonstrate the curing of a plastic paste using a conventional dentist's lamp - thanks to the germanium-based photoinitiator, this works without UV light. Credit Frankl - TU Graz Usage Restrictions May only be used when stating the credit "Frankl - TU Graz" License Original 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.