From Biopaste to Bioplastic (IMAGE) University of Freiburg Caption The biopaste used to print this cylinder consists of 50 percent lignin and 50 percent cellulose. Credit Photo: Lisa Ebers 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.