3D-printing pens change plastic filaments into a gel that hardens when it hits the air, allowing users to create sculptures freehand. A new company thinks that using all that plastic is expensive and wasteful, and is aiming to create a new kind of 3D pen that does its thing using old plastic bottles, bags and even folders. It’s called the Renegade and it’s seeking backers on Kickstarter now.
via Gizmag
