HP Inc 1 article published in JoVE Engineering Frugal Imaging Technique of Capillary Flow Through Three-Dimensional Polymeric Printing Powders Katrina J. Donovan1, James Stasiak2, Şebnem Özbek3, Willie E. Rochefort4, Travis W. Walker3 1Materials and Metallurgical Engineering Department, South Dakota School of Mines & Technology, 2HP Labs, HP Inc, 3Chemical and Biological Engineering Department, South Dakota School of Mines & Technology, 4School of Chemical, Biological, and Environmental Engineering, Oregon State University The proposed technique will provide a novel, efficient, frugal, and non-invasive approach for imaging fluidic flow through a packed powder bed, yielding high spatial and temporal resolution.