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What is 3D printing?
3D printing is a process in which a special printer gradually builds a three-dimensional model based on what it reads in a computer file. It works somewhat like a glue gun: the material goes into the printer, is heated and melted, and is then pushed out into a new shape; this is a process called extrusion. There are many different types of material 3D printers can use; ours print with PLA, a type of corn-based, biodegradable plastic.
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We currently have three 3D printers: a Makerbot Replicator 2 and two Lulzbot Minis. All print with the same type of plastic. We also have two 3D-printing pens.