Sono-Ink in Color (IMAGE) Duke University Caption Hardened Sono-Ink (appearing in red) in a model of a heart. DAVP prints 3D constructs by curing sono-inks with focused ultrasound waves. Credit Alex Sanchez, Duke University; Junjie Yao, Duke University; Y. Shrike Zhang, Harvard Medical School Usage Restrictions Usage 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.