SLA vs. SLS
Stereolithography (SLA) is often compared and contrasted with selective laser sintering (SLS).
There are several key differences between prototypes created with these two rapid manufacturing
techniques. These include:
1）Turn-around time: SLA prototypes can be completed in as little as 1-2 days, with larger projects taking fewer
than five.
2）Tight tolerances: SLA prototypes can achieve tolerances better than SLS.
3）Surface finish: SLA prototypes typically have a cosmetically superior finish, unlike SLS prototypes, which are
typically powdery and granular.
4）Small-batch: SLA is well suited for small-batch or small-lot manufacturing of prototype or end-use parts.5）Prototype strength: SLS prototypes are stronger and more durable than SLA prototypes.
6）Material properties: SLS allows product prototypes to be created with material properties similar to those of
injection molded prototypes.
7）Surface finish: SLS prototypes have a powdery finish, unlike SLA prototypes, which are smoother.8）Machining properties: It is easier to machine prototypes created using SLS than those created using SLA.
9）Material choice: SLS allows for product prototypes in many different thermoplastic materials.
10）Metal product prototypes: SLS can be used to create metal prototype parts using metallic powder in the laser
sintering process.
11）Post-completion processing: There is typically very little (if any) processing required after the SLS process is
completed.
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