SLA 3D Printing Technology



What is SLA (stereolithography)?

Stereolithography is the first commercialized 3D printing technology, invented by 3D Systems’ Co-Founder and Chief Technology Officer Chuck Hull in the 1980s. It uses an ultraviolet laser to precisely cure photopolymer cross-sections, transforming them from liquid to solid. Parts are built directly from CAD data, layer-by-layer into prototypes, investment casting patterns, tools, and end-use parts.

Once the SLA printing process is complete, SLA parts are cleaned in a solvent solution to remove any residual uncured resin from the part surface. Cleaned parts are then cured in a UV oven.

SLA 750

SLA 750


SLA 6000

ProX 6000HD

Highest 3D printed quality and accuracy for small to medium-sized parts in the SLA lineup.

250 x 250 x 250 mm (10 x 10 x 10 in) build volume


SLA 6000

ProX 7000HD

Mid-range integrated solution for SLA quality and accuracy.

380 x 380 x 250 mm (15 x 15 x 10 in) build volume


SLA 3D Printing Technology

Tolerances on SLA parts are typically less than 0.05 millimeters, making it an excellent choice when precision is your top priority. Delivering the smoothest surface finish of any additive manufacturing process, the quality of SLA parts makes this  versatile technology great for:

SLA line art

SLA Material Properties & Uses

sla rigid


Similar aesthetics and properties to injection-molded ABS

sla tough and durable

Tough & Durable

Look and feel of polypropylene

sla clear


Including the industry’s highest clarity material for polycarbonate-like parts

sla castable


Resins specifically formulated for QuickCast sacrificial patterns for investment casting

sla composite

Composite & High Temp

Heat deflection temperatures up to over 215c (419f) offering exceptional performance under extreme conditions

sla specialty

Specialty Material

Options for jewelry-specific casting and dental model production

Why Use Stereolithography?

sla accuracy

Unrivaled Accuracy and Precision

SLA 3D printers are able to deliver highly detailed, tiny parts just a few mm in size, all the way up to 1.5 m long parts—all at the same exceptional resolution and accuracy. Even large parts remain highly accurate from end-to-end, with virtually no part shrinkage or warping.

sla production quality

Production Quality

3D Systems has released 21 different SLA printers over the last 3 decades, each providing significant improvements over the previous version, offering you exceptional part quality. Our customers do not have to compromise speed or feature detail because we utilize two laser spot sizes per layer—delivering the best surface finish, small feature definition, and throughput.

sla material

Broad SLA Materials Selection

By working with our customers over the last 30 years, 3D Systems has supported more than 80 SLA additive manufacturing materials, tuned to application needs. Find the mechanical specifications you need in our existing portfolio, or talk to our experts to find what you’re looking for.

sla production

24/7 Production Utilization

Get the highest productivity possible with the fastest print technology for large and production runs. Quick interchangeable material delivery modules keep machines running to advance your part manufacturing workflow, while 3D Connect™ Service offers proactive and preventative support.