Stereo Lithography Apparatus(SLA)

Print your SLA parts with fast turnaround and wide variety of resin materials as fast as 2-3 days!

Overview: How SLA 3D Printing Works?

The Basics of SLA 3D Printing

Stereo Lithography Apparatus (SLA) is a powerful 3D printing technique ever developed. It produces highly accurate and high-resolution, detailed parts. It’s used directly in end-use, low-volume production, or for prototyping. Unionfab offers over 30 uniquely engineered SLA materials to enable products to the market at reduced production costs.

3D printing basics

Benefits of SLA 3D Printing

3D printing benefits
  • One of the advantages of Stereo Lithography Apparatus is its speed; functional parts can be manufactured within a day.

  • The length of time it takes to produce a single part depends upon the complexity of the design and the size. Printing time can last anywhere from hours to more than a day.

  • Prototypes and creations made with stereolithography are strong enough to be machined and can also be used to make master patterns for injection molding or various metal casting processes.

Benefits of SLA 3D Printing With Unionfab

  • Unionfab can provide customers with various SLA 3D Printing materials, including many high- performance materials. At the same time, we jointly develop unique materials for aerospace, medical and other applications with partners to help our customers expand the application scope and depth of additive manufacturing.

  • Unionfab has large-scale Industrial-level SLA 3D printers with a max build volume of 2100 x 700 x 800mm.

  • Unionfab provides rich post-processing options for SLA parts, and we have the capacity to achieve the best sample effect for you.

Features of SLA 3D Printing


Surface & Detail

SLA has tolerances of +/-.004” per inch, and resin surface is ideal for post-processing like polishing and painting.

Cose Saving

SLA is one of the cheapest method for rapid prototyping while preserving a good surface quality and accuracy.


SLA allows to integrate multiple components as well as thin-walled objects and intricate geometries that traditional method won’t be capable of.


SLA 3D printed parts do not require tooling which reduces the manufacturing lead time from weeks to days, allowing for faster innovation and speed to market.

Material Selection

There're various material with special properties like toughness, heat resistance, flexibility, which simulates the end products.

Scalable Volume

Multiple, identical parts can be built on a single platform at one time, greatly increasing production efficiency.



Photopolymers are not stable over time and most resins don’t have balanced impact/heat resistance.

Scale Effect

The unit cost and lead time will not be reduced as much as casted or molded parts.

Design Guidelines: Stereo Lithography Apparatus(SLA)

  • Max Part Size
  • Layer Thickness
  • Minimum Feature Size
  • Minimum Wall Thickness
  • Tolerances
  • Surface Finish Options
Max Size82.68 in. x27.55 in. x31.50 in.2100 mm x 700 mm x 800 mm
Normal Size31.50 in. x31.50 in. x 21.65 in.800 mm x 800 mm x 550 mm
Standard Size23.62 in. x 23.62 in. x 15.75 in.600 mm x 600 mm x 400 mm

SLA Machines of Unionfab

Production Machines

ProcessNameNumbersProcess Size(mm)Detail
SLAUniontech-LITE600HD394600*600*4008 files
Uniontech-LITE800HD139800*800*5504 files
Uniontech-G140041400*700*5006 files
Uniontech-G180031800*900*6003 files
Uniontech-G210012100*700*8003 files
Uniontech-RS PRO4505450*450*3503 files

Post-Process Machines

ProcessNameNumbersProcess Size(mm)Detail
Sand-blastingSand blasting machine2400*800*5000 files
AnodizedAnodizing equipment2800*2000*5000 files
PolishChemical polishing line2600*1200*4000 files
Magnetic polishing machine260*60*600 files
PaintingPainting Line21000*2000*10000 files
ElectroplatingElectroplating line2600*1800*5000 files

Available Finishes

In addition to the removal of support structures, the part surface is media blasted to provide a uniform finish.
available finish - defaults

SLA 3D Printing Applications

With SLA, the prototype can be made using nylon material with great functionality. Fast turnaround makes it a good choice for functional prototyping.
Customized Products
The speed and versatility of SLA let variable production of customized gifts/samples for different users become possible.
Batched Products
SLA can be applied to make high-quality small batched products from 1-10,000 units, ideal for small businesses that wishes to test the market’s reaction to their newly developed products.

Industries with SLA 3D Printing

Consumer Products
Art and Fashion

Knowledge Base