Watch a simple pen turn flat drawings into 3D objects

Standard 3D printing requires a bulky, pricey machine, but what if you could fit that technology in your pocket? Researchers have harnessed a familiar instrument—the pen—to create a first-of-its-kind process that transforms flat ink drawings into 3D objects when the drawings are dipped into a special solution. The advance could create everything from furniture to solar panels with the ease of 2D printing.

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