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3D printing
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illustration of the selective laser sintering (SLS) process
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illustration of the selective laser sintering (SLS) process
illustration of the selective laser sintering (SLS) process The selective laser sintering (SLS) process, showing (top) the rolling of a thin layer of powder over the work area, (middle) the sintering of powder by a laser beam to build up the workpiece, and (bottom) the rolling of fresh powder over the workpiece to begin a new layer.

3D printing

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Also known as: three-dimensional printing
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three-dimensional printing
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3D printing, in manufacturing, any of several processes for fabricating three-dimensional objects by layering two-dimensional cross sections sequentially, one on top of another. The process is analogous to the fusing of ink or toner onto paper in a printer (hence the term printing) but is actually the solidifying or binding of a liquid or powder at each spot in the horizontal cross section where solid material is desired. In the case of 3D printing, the layering is repeated hundreds or thousands of times until the entire object has been finished throughout its vertical dimension. Frequently, 3D printing is employed in ...(100 of 1060 words)

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