3D bioprinting skin layers (IMAGE) Penn State Caption Miji Yeo, a postdoctoral researcher at Penn State, checks the bioink cartridges on a 3D printer developed to intraoperatively print layers of skin. Credit Credit: Michelle Bixby/Penn State. All Rights Reserved. Usage Restrictions May used with credit. 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.