Kordspace 3D Printer Review: FormLabs Form 3L

A prototype can look excellent on a screen and still fail the moment someone holds it. Grip, scale, clearance, and surface finish are physical questions, and answering them becomes harder when a desktop printer forces a product enclosure into several glued-together pieces.

That is the appeal of the Formlabs Form 3L. Announced in 2019, it takes the company’s resin-printing approach into a substantially larger build envelope, promising detailed parts without as much splitting, joining, and finishing. For a studio connecting software with physical products, that is an interesting proposition.

This review uses a 2019 perspective; tools, interfaces, specifications, and availability may have changed since then.

There is an important qualification: in 2019, the Form 3L is an announced machine rather than an established production tool with a long field record. This is therefore a specification-based review and purchasing assessment, not a hands-on test. Claims about unboxing, measured accuracy, or successful Kordspace print runs would be premature.

What the Form 3L Brings to the Table

The Form 3L is a large-format resin printer built around Formlabs’ Low Force Stereolithography, or LFS, technology. Like other stereolithography systems, it uses light to selectively cure liquid photopolymer resin, building an object layer by layer.

Its headline specification is an announced build volume of 335 × 200 × 300 mm. That opens up possibilities for larger housings, design models, fixtures, and batches of smaller components.

| Feature | Announced direction | Practical significance | |---|---|---| | Build volume | 335 × 200 × 300 mm | Larger single-piece prototypes and more room for batching | | Printing process | Low Force Stereolithography | Designed to reduce separation forces during printing | | Optical system | Two Light Processing Units | Two laser-based units address the larger print area | | Preparation software | PreForm | Model orientation, supports, and print preparation in the Formlabs ecosystem | | Material delivery | Cartridge-based resin handling | Less routine manual pouring, but not a maintenance-free process |

These features make the Form 3L more than a scaled-up desktop curiosity. However, a larger build envelope does not automatically produce a better workflow. Cleaning, curing, support removal, and material handling all grow with the part.

Why the Size Matters

Printing a housing in one piece can preserve its visual continuity and avoid adhesive seams. It can also make ergonomic reviews more representative: a joined prototype may flex differently from a continuous shell.

The same space can accommodate multiple smaller parts, but batching introduces a trade-off. A failed job can affect several components at once, and a crowded platform may make support planning and cleanup more difficult.

Treat the build volume as a geometric limit, not a guaranteed usable part size. Supports, orientation, and clearance consume space. A model whose longest dimension fits the specification may still need a different orientation or a split design.

Design and Setup: Professional Appearance, Real Workspace Demands

The announced design follows Formlabs’ recognizable enclosed format, with a tinted cover and front-facing touchscreen. It looks appropriate for a product-development studio, but appearance is the least important part of installation planning.

Without a delivered unit to inspect, we cannot responsibly judge packaging protection, assembly effort, touchscreen responsiveness, or chassis quality. Those belong in a later hands-on review.

What buyers can assess now is the space around the machine. A suitable installation needs room to access the printer, handle a wet build platform, stage tools, and transfer large parts into cleaning and curing equipment.

Plan a Workflow, Not Just a Printer Location

Before ordering, map the movement of a part through four areas:

• Printing: a stable surface with access for routine inspection and maintenance.
• Removal and washing: a protected workspace for uncured resin and cleaning solvent.
• Drying and curing: enough capacity for the largest intended geometry.
• Finishing and inspection: a clean area for removing supports and checking dimensions.

Follow material safety data sheets and local requirements for ventilation, protective equipment, solvent storage, and waste disposal. An enclosure does not eliminate chemical-handling responsibilities.

Most importantly, confirm that finishing equipment can actually accommodate your parts. Do not assume an existing desktop wash or cure setup will scale alongside the printer.

LFS and the Dual Optical System

In bottom-up resin printing, each newly formed layer must separate from the tank interface before printing continues. That separation can put stress on supports and delicate geometry.

Formlabs’ LFS approach uses a flexible tank and controlled separation to reduce those forces. The intended benefits include gentler handling of the developing part and supports that are easier to remove. These are useful design goals, particularly as cross-sections become larger.

However, the process does not remove the need for sound orientation and support placement. Broad surfaces, thin walls, and enclosed cavities still demand care.

Two LPUs Do Not Mean Every Job Prints Twice as Fast

The Form 3L is announced with two Light Processing Units, or LPUs, to address its larger printing area. That optical architecture is important, but it should not be translated into a universal speed multiplier.

Build time depends on layer count, exposure requirements, the distribution of geometry, and the mechanical steps between layers. A tall, narrow component and a platform full of short parts have different workloads.

For a purchasing decision, request estimates for your own models using the intended material and settings. Generic speed claims are less useful than a realistic estimate for the enclosure or fixture your team prints every week.

Print Quality: Promising, but Not Yet Proven Here

Resin printing is attractive for fine features, smooth-looking surfaces, and presentation models. The Form 3L’s architecture makes it a plausible candidate for detailed product prototypes at a larger scale.

Still, resolution is not the same as dimensional accuracy. Layer height describes one aspect of how a part is built; it does not guarantee that every hole, mating surface, or long edge will meet a drawing.

Material behavior, orientation, support forces, washing, and post-curing can all affect the finished result. Long, thin parts deserve particular scrutiny because small distortions become noticeable across their length.

What a Meaningful Quality Test Should Include

A useful evaluation would print representative geometry rather than only a decorative demonstration model:

• A housing with ribs, bosses, and mounting holes.
• A broad panel to check flatness after curing.
• Mating components to evaluate practical fit.
• Fine text and small features for visual inspection.
• Repeated parts positioned across the build area.

Measure after the required finishing process, not immediately after printing. Record the material, orientation, settings, and cure procedure so results can be reproduced.

Surface quality should also be judged on supported faces. A polished-looking top surface says little about the sanding needed where supports contact a visible edge.

How to Evaluate a Form 3L Workflow

PreForm is central to the proposed experience, providing print preparation within the Formlabs ecosystem. Its value is not simply generating supports; it connects geometry decisions to an executable print job.

For a team considering the machine in 2019, the following evaluation sequence is more useful than an unconditional recommendation.

1. Choose a Representative Part

Start with something your team actually needs. Identify critical dimensions, visible surfaces, expected loads, and the reason it benefits from resin printing.

Separate appearance requirements from functional ones. A display enclosure and a repeatedly flexed clip may need different materials, even when they belong to the same product.

2. Verify Material and Printer Compatibility

Do not assume every resin in the wider Formlabs catalog will be supported on the Form 3L at launch. Confirm the expected compatibility and availability of the exact material required.

Check its handling and post-curing requirements as well as its mechanical properties. A beautiful prototype is not necessarily suitable for heat exposure, impact, or sustained loading.

3. Orient and Support the Geometry

Use PreForm to explore orientations rather than accepting the first arrangement. Keep support contacts away from cosmetic and mating surfaces where possible.

Large flat sections can be challenging. Hollow parts may reduce material consumption, but they need suitable drainage and venting to avoid trapped resin and problematic suction effects. An enclosed hollow shell is not a safe shortcut to lower cost.

4. Check the Complete Finishing Route

Before printing, establish how the part will be removed, washed, dried, cured, and inspected. Confirm access to internal cavities and enough equipment capacity for the whole object.

Cartridge-based delivery simplifies resin supply; it does not make material changes effortless. Tanks, platforms, and contaminated tools still require attention according to manufacturer guidance.

5. Run a Controlled Pilot

When production hardware is available, print a small evaluation set before committing valuable work to a full platform. Inspect supported surfaces, dimensions, warping, and assembly fit.

Record hands-on labor as well as machine time. A process that prints quickly but requires extensive finishing may not improve turnaround.

6. Repeat Before Standardizing

One successful print demonstrates possibility, not reliability. Repeat the job and document failures or adjustments. Only then should the team define standard orientations, acceptance criteria, and maintenance routines.

Cost: Judge the Finished Part, Not the Machine Alone

The Form 3L targets professional buyers rather than casual hobbyists. Its value depends on whether larger resin parts solve a recurring problem expensive enough to justify the equipment and workflow.

A realistic budget includes more than the printer:

• Resin for parts, supports, and unsuccessful attempts.
• Tanks and other replaceable components.
• Washing and curing equipment of suitable capacity.
• Cleaning supplies, protective equipment, and waste handling.
• Operator time for preparation, finishing, and inspection.
• Downtime and outsourced fallback work.

For occasional large prototypes, a service bureau may be the better choice. For frequent iterations, in-house printing could reduce coordination and waiting, but that advantage must be tested against actual utilization.

Compare it with alternatives honestly. Large-format filament printing may suit bulky fit checks at a lower material cost, while machining may better match certain dimensional or material requirements. Resin is not automatically the right answer because its surfaces look refined.

Common Pitfalls to Avoid

Buying on build volume alone. A large printer without matching finishing capacity leaves the workflow incomplete.

Treating resin as ordinary plastic. Cured photopolymers have material-specific limits, and uncured resin requires careful handling. Do not put resin or contaminated wash liquid down a drain.

Assuming the system is environmentally benign. “Green” should not be inferred from compact manufacturing or reduced assembly. Supports, failed parts, solvent use, and disposal all matter.

Ignoring launch-stage uncertainty. In 2019, delivery expectations, supported materials, and accessory availability need confirmation before purchase. Do not schedule a critical product milestone around unverified availability.

Verdict and Takeaway

The Formlabs Form 3L is a compelling 2019 announcement for teams that need large, detailed resin prototypes. Its build envelope, LFS process, and dual-LPU architecture address a meaningful gap between desktop printing and more demanding physical product work.

It is not yet appropriate to call it a proven production workhorse on the evidence presented here. Kordspace’s recommendation is to shortlist it, request representative sample parts, and validate the entire print-to-finished-part workflow before committing.

Takeaway: the strongest reason to consider the Form 3L is not size alone. It is the possibility of making useful, detailed, single-piece prototypes, provided the materials, finishing process, and repeatability meet your actual needs.