Form 3L - Large resin 3D printer


Form 3L

A Large Format 3D Printer Compact Enough for the Office and Robust Enough for the Factory Floor

Take control of large-format prototyping and bring your biggest ideas to life with the Form 3L, a cost-effective large scale 3D printer that doesn’t compromise on the details.

Big Parts, Big Ideas

With a large build volume of 33.5 × 20 × 30 cm (13.2 × 7.9 × 11.8 in),
you can print full-scale bulky prototypes or detailed models.

Outsourcing icon

Stop outsourcing large-scale prints

Work faster with a large format 3D printer that’s versatile enough to bring large scale fabrication in-house.
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Life-sized prints for larger-than-life ideas

The Form 3L is large enough to print human-scale models, like a prototype of a helmet that’s ready to try on.
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Perfectionism that scales

Two precision Light Processing Units inside this large resin printer achieve consistent accuracy and detail across the entire build platform.

Draft Resin

Print Time

8 hours

Print Cost


Part By

Black Diamond Equipment


Black Diamond Equipment is prototyping climbing helmets at 1:1 scale to test for form and fit, producing several iterations per week in-house and reducing costs. Read more about how Black Diamond uses the Form 3L.

Note: print time and cost will vary based on part geometry, material, layout, and orientation.

100,000,000 Parts Printed With Formlabs Technology

New Balance logo
Harvard University


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Intuitive and efficient

No specialized technicians required. The Form 3L offers automatic resin dispensing, simple print preparation software, and a thoughtfully designed interface.

form 3l large resin 3d printer screen

High-resolution touchscreen interface:
A 5.5” interactive full-color display minimizes error and eliminates the need for constant monitoring.

Automated print setup:
Tested over millions of prints, our free print preparation software, PreForm, automatically suggests optimal orientation, supports, and layout, with the ability to manually refine as needed.

Continuously evolving:
We believe the best products grow better over time, and we’re committed to continually evolving our hardware through software improvements.

Nonstop Printing

Print Around the Clock Icon

Print around the clock

The Form 3L constantly monitors print performance so you can focus on bringing your most creative ideas to life. Integrated sensors help maintain ideal print conditions for nonstop throughput with minimal supervision.

Cloud monitoring:
Remotely monitor and manage your fleet of large format 3D printers with the online Dashboard.

Fast-printing material:
Draft Resin balances detail and speed to save time on bulky prototypes and enable quick iteration.

In-field repairs:
The Light Processing Units, rollers, optics window, and other components can be replaced in-house to ensure 24/7 uptime.


Part Quality icon

Professional parts

Stop sacrificing on quality for large-format 3D prints. The Form 3L provides the smooth surface finish, fine details, and high-performance properties that resin 3D printing is known for.


XY Resolution

25 - 300μm

Layer Thickness*

* Available layer thickness settings vary by material. Find the latest information on material and setting availability here.

3D printed sample

Smooth surface finish:
Models printed on the Form 3L resemble polished injection-molded parts and can reach high translucency, for realistic looks-like prototyping.

Consistent precision:
A system of lasers and mirrors ensures uniform print quality, for an XY resolution of 25 microns across the entire build platform.

Advanced materials:
Each Formlabs material comes with optimized print settings to guarantee industry-leading print success and reliability, as well as standout mechanical, thermal, or biocompatible properties.

The Form 3L Workflow in Five Minutes

Get more done and work more efficiently with an end-to-end 3D printing workflow. From printing, to post-processing, each step of the process was designed with efficiency in mind. 

Watch the Webinar

Advanced Materials for Industrial-Quality Parts

Bring your parts to life with the most comprehensive library of high-performance materials on the market, developed specifically for Formlabs printers by a team of in-house materials scientists. With simplified material switching and automatic resin dispensing, the Form 3L allows you to walk away and focus on other work once your print job starts.

Total freedom with Open Platform

Enhance your printer’s versatility with certified third-party materials, customizable print settings, or the ability to experiment with any unvalidated 405 nm photopolymer resin (optional, paid license). 

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Switch materials in minutes.

Avoid the hassle and mess of purging materials with our swappable cartridge system, cross-compatible with other Formlabs SLA printers.

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Automatic resin dispensing.

Our automated resin system dispenses resin as parts print. The Form 3L holds two cartridges of resin to avoid mid-print interruptions.

Explore All MaterialsLearn More About Open Platform

Available layer thickness settings vary by material. Visit our material settings roadmap for more details.

Large resin 3D printer Form 3L

Part of the Formlabs Ecosystem

Formlabs is known for designing end-to-end additive workflows you’ll be excited to use. The Form 3L brings the Formlabs experience to large format 3D printing.

build platform 2l

Quick Release Technology

Build Platform 2L with patented Quick Release Technology easily releases parts from the build platform in seconds - no tools required.

Compare Formlabs SLA 3D Printers

Build Volume (W × D × H)
20.0 × 12.5 × 21.0 cm
7.9 × 4.9 × 8.3 in
5.25 liters
33.5 × 20 × 30 cm
13.2 × 7.9 × 11.8 in
21.4 liters
33.5 × 20 × 30 cm
13.2 × 7.9 × 11.8 in
21.4 liters
Masked Stereolithography (MSLA)
Stereolithography (SLA)
Stereolithography (SLA)
Light Source
Backlight Unit (60 LEDs)
Two 250 mW lasers
Two 250 mW lasers
Biocompatible Materials
No (available on Form 4B)
18.3 kg
40.4 lb
54.4 kg
120 lb
54.4 kg
120 lb
Printer Dimensions (W × D × H)
39.8 × 36.7 × 55.4 cm
15.7 × 14.5 × 21.9 in
77 × 52 × 74 cm
30.3 × 20.5 × 29.1 in
77 × 52 × 74 cm
30.3 × 20.5 × 29.1 in

Built on Low Force Stereolithography (LFS)™ technology for groundbreaking print quality and printer reliability.

Form 4 3D printer

The Next Generation of Industrial 3D Printing

Form 4 is powered by our Low Force Display™ (LFD) Print Engine, setting the new industry standard for blazing-fast speed, unmatched reliability and accuracy, and the widest range of performance 3D printing materials.

Maximize Your 3D Printer Fleet’s Throughput with 24/7 Production

Reach new levels of productivity with a fully automated fleet of Form 3+ 3D printers that you can operate from anywhere. Skyrocket your ability to produce high-quality, affordable parts with 24/7 back-to-back production with the Formlabs Automation Ecosystem: Form Auto, Fleet Control, and Resin Pumping System.

Learn More
3D printing ecosystem