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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.
- The engineer: The rise of additive manufacturing
- "3D Printer Technology - Animation of layering". Create It Real. http://www.createitreal.com/index.php/en/3d-printer/48. Retrieved 2012-01-31.
- Sherman, Lilli Manolis. "3D Printers Lead Growth of Rapid Prototyping (Plastics Technology, August 2004)". http://www.ptonline.com/articles/200408cu3.html. Retrieved 2012-01-31.