SLA: High Resolution Parts

How Does Stereolithography (SLA) 3D Printing Work?

Stereolithography (SLA) is a powerful 3D printing technology that produces extremely accurate and high resolution parts that are capable of being used directly in end-use, low-volume production, or for rapid prototyping.

SLA is an additive manufacturing process that focuses an ultraviolet (UV) light on a vat of photopolymer resin. It offers higher resolution printing than many other 3D printing technologies, allowing customers to print parts with fine details and surface finishes. SLA 3D printing is a highly-versatile platform for making custom parts in prototype and production settings; often acting as a stand-in for injection molded plastic parts.

Why SLA Printing With Xometry?

Xometry will offer both standard and high-resolution options for fine detail parts, and can also print larger sized parts and products, with some materials offering up to a 58" inch build area. In addition, Xometry's manufacturing partner network allows us to offer a larger variety of materials than other 3D printing companies - we offer a wide range of both Accura and Somos brand materials.


SLA Featured Resources

3D Printing is Not a Cheat Code

3D Printing is Not a Cheat Code

Get expert insight on understanding 3D Printing from our own Director of Applications Engineering, Greg Paulsen. Learn how to make the most of this additive manufacturing capability with his expert tips.

SLA Applications

Concept Models

The speed and versatility of SLA lets product developers create physical snapshots of their designs through the iterative process.

Rapid Prototyping

SLA can be used to create fully-functional prototypes, with materials that can simulate polypropylene, polycarbonate, ABS, and rigid composites.

Direct Digital Manufacturing

The high accuracy and consistency of SLA makes it an ideal way to build large quantities of discrete or customized parts.

SLA Advantages


We use the latest generation of SLA technologies to meet tolerances of +/- 0.004” or +/- 0.001” per inch, whichever is greater, and offer both normal and high resolution prints. Please see our Manufacturing Standards for more details.

Rapid Turnaround

Because SLA can create complex and multi-material parts in a single operation, significantly less build time is needed vs. traditional manufacturing.

Material Selection

Offers a vast material selection with a range of properties, as well as the ability to print multiple materials and simulate overmolds.

Complex Geometry

Creates complex shapes with a high degree of precision that would otherwise be impossible to build via traditional manufacturing processes.

SLA Materials


  • Accura
  • Somos

SLA Finishes


SLA parts are cleaned, stripped of supports, and may be lightly sanded around supported area. Supported areas may show small grid-like dots where structure was required.


SLA parts are cleaned, stripped of supports, and then either wet or dry grit blasted to give a consistent matte finish. The parts are left with an eggshell finish. Supported areas may show small grid like dots where structure was required.

Additional Finishes

Xometry provides additional SLA finishing options, including but not limited to sanding, polishing, painting, post thermal processing, and plating to meet your needs.

SLA Design Guide

SLA Design Guide

Stereolithography (SLA) is an additive manufacturing process that can efficiently produce durable, high resolution end-use parts and prototypes.

Learn how you can apply SLA to your next project. Download your free guide today.

Download Guide