50 Percent Lignin by Weight (IMAGE) DOE/Oak Ridge National Laboratory Caption Using as much as 50 percent lignin by weight, a new composite material created at ORNL is well suited for use in 3D printing. Credit Oak Ridge National Laboratory 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.