PolyJet 3D printed molds are not production tools. But during the design and testing phase, they offer a clear advantage over conventional injection molding. Product designers and manufacturers can use these molds to perform thorough functional testing without worrying about cost-prohibitive tooling. Flaws based on the final production process, geometry or choice of plastic can be discovered early, when they are easiest to fix. This can reduce costly, time-consuming mold corrections, increase product innovation and speed product development.