sla - stereolithography
about stereolithography
Stereolithography is the most widely used rapid prototyping technology. It is generally considered to provide the greatest accuracy and best surface finish of any rapid prototyping process. SLA has a high resolution and is most commonly used as patterns for silicone tooling. Often sanded, painted, & tinted. Stereolithography is fast, allowing prototypes to be made in a matter of days, and the complexity of the model is seldom a factor.