SLS – SELECTIVE LASER SINTERING
The Selective Laser Sintering process is very similar to the principles of stereolithography. The difference lies in the use of a polymer powder instead of a photo-sensitive resin. The manufacture of parts is carried out by stacking successive layers. Each of these layers is formed by the passage of the laser which carries the particles in a liquid state and binds them together. Unlike stereolithography, no support is needed to hold the part or parts in place during manufacture as the unsintered powder provides the support for the subsequent layers of construction.