Glass making (IMAGE) Friedrich-Schiller-Universitaet Jena Caption Jena glass chemists want to further develop a process for thermally hardening very thin glass. Credit Jens Meyer/University of Jena 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.