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[[File:ORDbot quantum.jpg|thumb|upright=1.3|A 3D printer.]]
'''3D printing'''<ref name=engineer>[http://www.theengineer.co.uk/in-depth/the-big-story/the-rise-of-additive-manufacturing/1002560.article The engineer: The rise of additive manufacturing]</ref> is when [[three dimensional|3D]] solid objects are made from a model on a computer. 3D printing is done by building up the object layer by layer.<ref>{{cite web |url=http://www.createitreal.com/index.php/en/3d-printer/48 |title=3D Printer Technology - Animation of layering | publisher=Create It Real |accessdate=2012-01-31 }}</ref>
3D printing is usually done with a materials printer. Since 2003, many more materials printers have been sold than before. Also, the cost of 3D printers has gone down.<ref>{{cite web |url=http://www.ptonline.com/articles/200408cu3.html |title=3D Printers Lead Growth of Rapid Prototyping (Plastics Technology, August 2004) | first=Lilli Manolis |last=Sherman |accessdate=2012-01-31 }}</ref>
== References ==
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[[Category:Computer hardware]]
[[Category:Output devices]]
[[Category:3D printing]]