How about a printer that uses graphite as ink to print on paper which you can easily erase later? Sounds nice eh? That means, less wastage of paper and no more cartridge and ink problems. Currently just a concept, designed by Hoyoung Lee, the Pencil Printer does what may bring a smile on environmentalists. The pictures below, courtesy Yanko Design, depict the working of the Pencil Printer.
If this one ever becomes a reality, I’m going for it! What do you say? 
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want to see the demo. how to get?
Awesome! Nice design and awesome idea…I love it…
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