Smart Ink Printed Structures (IMAGE) Dartmouth College Caption An example from the research shows how a 3-D-printed object composed of hydrogel (G1) can change size after printing. While this example serves to demonstrate the result, other objects can be used as filters or storage devices. Credit Chenfeng Ke Usage Restrictions Use for stories directly related to this research. 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.