Solid freeform fabrication (SFF) is a method of making shapes without molds.It is best known in its stereolithography forms as a method of rapid prototyping.In stereolithography a laser photopolymerizes successive thin layers of monomer to build up a solid object.Extrusion solid freeform fabrication was developed by the University of Arizona in collaboration with Advanced Ceramic Research (Tucson,AZ),it functions essentially as a three-dimensional (3D) pen plotter.
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