New Form 4 SLA System Achieves 5x Speed Improvement Over Previous Generation

Formlabs unveiled its fourth-generation SLA platform in February 2026, claiming a 5x reduction in build time for representative parts compared to the Form 3+. The improvement comes from a novel "variable laser power" optical system that dynamically adjusts exposure based on geometry -- larger flat surfaces receive higher power for faster curing, while fine features use lower power for precision.

Technical Details

The Form 4 uses a redesigned optical engine with a Galvo-based scanning system capable of 12.5m/s beam traversal speed -- approximately three times faster than the Form 3+ system. The resin cartridge system has also been reengineered, with automatic thermal compensation that maintains optimal viscosity across a wider ambient temperature range.

Perhaps more significant than the hardware is the ecosystem: Formlabs introduced an open resin platform in 2025, and the Form 4 builds on this with an expanded approved materials list that now includes 30+ third-party resins alongside Formlabs' proprietary formulations.

Implications for Service Bureaus

The speed improvement has direct economic implications. For a service bureau running overnight or multi-day builds, a 5x speed improvement could effectively multiply the number of parts produced per week on the same machine footprint. This has the potential to meaningfully reduce per-part costs -- particularly for large-format SLA parts where build time has historically been the dominant cost driver.

The improvement is most pronounced for parts with significant flat surface area -- such as investment casting patterns, large functional prototypes, and orthopaedic models -- rather than fine-detail jewelry or dental applications where the limiting factor is laser spot size rather than scan speed.

Broader Market Context

Formlabs faces increasing competition in the professional SLA market from Chinese manufacturers like UnionTech and Elegoo, which offer larger build volumes at lower price points. The Form 4's speed advantage may help justify its premium pricing position as the technology matures.

PrintVX operates multiple SLA platforms including the Form 4 to ensure optimal price-performance for each application -- with standard lead times of 2-5 business days.