Additive Manufacturing Device Builds Prototype (IMAGE) NYU Tandon School of Engineering Caption A 3-D printing device layers polymers to build an object by depositing material in very small layers. Orientation of those layers is critical to product integrity. Defects hidden between these layers can go unnoticed in post-printing tests. Credit NYU 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.