Onetime Microsoft executive Jonathan Roberts knows that not all 3D-printed personal protective equipment being produced for the nation’s coronavirus response is created equal.

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The past few weeks have thrust 3D printing technology into the spotlight as entrepreneurs and well-doers scramble to convert factories, shops and even home basements into makeshift assembly lines to produce personal protective equipment (PPE) for embattled health care workers. Once best known for a Texas company’s nationwide distributing of blueprints for homemade handguns, 3D printing is now viewed as a potential lifesaver in the race to get masks, visors, shields and other PPE to those needing them most. But amid concerns about the effectiveness of PPE made from 3D printers, Roberts used his connections at Seattle-based nonprofits and tech firms […]

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