How SLS Works
The SLS process works by firing a laser into a bed of nylon powder, fusing (sintering) the parts shape layer by layer.
Then, the machine sweeps another layer of powder over the top and shoots the laser again. This process is repeated thousands of times until the build is completed.
The unsintered material around a part acts as a bed of powder and supports the part during sintering. Once the build has completed the parts are left to cool down, then you simply shake off the powder from the part and the printed part can be used right away.