New 3-D Printers that Don’t Suck | Wired

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Fortunately, a new generation of higher-resolution, faster, and more reliable machines are starting to come to market.

This new breed of printer use Stereolithography (SLA) technology, utilizing light instead of heat to make models. How? A high powered light source hardens a cross section of light-sensitive liquid plastic. The machine then raises the build platform a smidge and the process is repeated. It’s very dramatic — models look like they are being pulled from a puddle of goo.

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