Selective laser sintering is SLS, uses the high power laser to fuse plastic of powder nylon to create 3d prints.
The process starts with the thin layer of nylon. A laser scans the surface the of powder, sintering or fusing the powder into a solid section, the bed lowers then the laser scans the next layer.
When the built is complete, you left a fund of powder, the 3d objects are taken away. And the rest of powder is reused in the future print round.
Standard SLS prints are typically white, with the slightly rough surface, the surface is porous and absorb water.
Thin design features are flexible and quite strong, thicker walls are solid and durable.
The powder creation has no hanging supports to cut or melt away.
The finished parts are cleaned and wiped to move extra powder.
SLS is actually one of the most economical material choices you will find at commercial print service. It is a great choice for the low-cost projects.
Powder of nylon can be dyed in a variety of colors, many 3d printing services selfdye prints but you can actually custom dyed nylons.
Laser sintering is used with other materials too, steel powder can be used to create metal prints, ceramics powder can be sintered to create ceramics objects, or more flexible materials can be also used to create prints with greater flexibility.
SLS is currently a commercial technology, but the initial patterns have expired, the civilian market is inspired. There is a challenge adapting this technology to the consumer market.
But this a good chance to see adaptations of this technology on the desktops soon.