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STEREOLITHOGRAPHY (SLA)

What is Stereolithography?

Stereolithography is a rapid prototyping process which produces a physical, three-dimensional object from a 3D CAD file.  Stereolithography is commonly referred to as SLA, although SLA is really a StereoLithography Apparatus.  A stereolithography apparatus uses a computer controlled laser to cure a liquid photo-curable resin, layer by layer, to create a 3D part.
Why Use Stereolithography?

Stereolithography is very similar to the SLS® (Selective Laser Sintering) prototyping process.  It's best to use SLA, when surface finish and overall appearance straight from the machine is the most important factor in the prototype. 

Stereolithography models can also be used as master models, when it comes time for multiple prototypes to be produced through secondary tooling.  The SLA model is built, the pattern finished and then the silicone rubber is poured around the SLA model to produce a tool that will yield 30+ urethane castings.

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