When rapid prototyping or even a limited production run is being considered, the choice lies between SLS and SLA. There is frequently a tendency to automatically opt for SLS (Stereo Laser Sintering) in preference to SLA (Stereolithography), though in truth each has its own advantages. This is partially because no support structures are needed. Nonetheless one must look at the characteristics of the various materials available and the end products from each process before deciding.
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