There are many types of rapid manufacturing services on markets, for example, SLS, SLM, and DMLS. They all refer to 3D printing technology, but they are slightly different. They primarily differ in materials. The materials used for SLS printing are plastic, glass, ceramic, while SLM or DMLS as the most popular metal 3D printing technologies use metal powder. Besides the difference in materials used, their processes though are very similar still have some differences. SLS vs. Metal Printing Technology: let us see what they are in common and what they differ from each other.