Form 4BL
Formlabs Form 4BL
Blazing-Fast Prints. Big Results
A large-format dental 3D printer delivering ultra-high-volume accuracy and reliability. Built for engineering, medical, and dental applications, it combines Low Force Display™ (LFD) technology with a larger build volume to produce more parts, larger appliances, or full-arch models in a single cycle—without compromising precision, speed, or material versatility.
Key Features of Form 4BL
Large-Format Efficiency
Print 3× more models per run, scaling production with fewer interventions.
Sharp Detail & Smooth Finish
46 µm resolution, anti-aliasing, and Light Touch Supports deliver injection-molded quality.
Proven Reliability
98.7% success rate with six intelligent control systems for maximum uptime.
Material Versatility
Supports biocompatible, sterilizable, and high-performance Formlabs resins plus Open Material Mode.
Easy to Use
15-minute learning curve, automated resin handling, and streamlined four-step workflow.
Accelerated Applications
Ideal for dental, medical, and prototyping—fast iterations, compliance, and quicker time-to-market.
Technical Specifications
| Category | Specifications |
|---|---|
| Technology | Masked Stereolithography (MSLA) |
| Printer Engine | Low Force Display™ (LFD) |
| Key Components of the Print Engine | – Backlight Unit – Light Processing Unit 4L (LPU 4L) – Release Texture – Flexible Film Resin Tank – Intelligent Control Systems – Automatic Resin Handling |
| Light Source | – Backlight Unit: 145 uniform-wavelength LEDs, plano-convex lens array, integrated air cooling – 405 nm optical wavelength – 16 mW/cm² optical power intensity at cure plane – 46 µm pixel size |
| Maximum Print Speed¹ | 80 mm/hr (3.1 in/hr) |
| Typical Print Speed² | – Average: 24 mm/hr (0.9 in/hr) across all materials – Range: 20–35 mm/hr (0.8–1.4 in/hr), depending on material |
| Typical Dimensional Tolerances (XY)³ | – 1–30 mm features: ±0.15% (lower limit: ±0.02 mm) – 31–80 mm features: ±0.3% (lower limit: ±0.06 mm) – 81–150 mm features: ±0.3% (lower limit: ±0.15 mm) |
| Surface Accuracy (Restorative Models)⁴ | With Precision Model Resin: – 99.9% of surfaces within 100 μm of CAD model – 96.7% within 50 μm – 71.4% within 25 μm |
| Reliability | Testing in progress |
| Materials | 32 Formlabs materials (including 12 biocompatible) + Open Material Mode for 3rd-party resins |
| Biocompatible Materials | Yes |
| Build Volume (W × D × H)⁵ | 35.3 × 19.6 × 35.0 cm (13.9 × 7.7 × 13.8 in) 24.2 L |
| Build Area | 692 cm² (107 in²) |
| Maximum Part Length⁶ | Not measured |
| XY Resolution⁷ | 46 µm (with pre-tuned anti-aliasing for subpixel resolution) Higher fine feature performance vs Form 3L |
| Layer Thickness⁸ | 25–200 µm (0.001–0.008 in) |
| Resin Cartridges | 2 |
| Resin Cartridge Type | Next-generation: – 5–10× faster filling – 63% less waste – 30% less shelf space |
| Resin Heating | High-speed conduction heating with infrared temperature sensing |
| Internal Temperature | Auto-heats resin to 25–45 °C (77–113 °F), depending on material |
| Force Sensing | Z-Axis Force Sensor (optimizes print quality & speed based on geometry & material) |
| Supports | Auto-generated, light-touch removal |
| Printer Dimensions (W × D × H) | 66.4 × 52.8 × 79.4 cm (26.1 × 20.8 × 31.3 in) |
| Minimum Access Dimensions (W × D × H) | 88.9 × 116.9 × 81.3 cm (35 × 46 × 32 in) |
| Printer Weight | 58.5 kg (129 lb) |
| Operating Environment | 18–28 °C (64–82 °F) |
| Power Requirements | 100–240 VAC 9 A 50/60 Hz 900 W |
| Connectivity | Wi-Fi (2.4 & 5 GHz, IEEE 802.11 b/g/n/ac, WPA/WPA2) Ethernet (1000 Mbit) USB-C 2.0 |
| Printer Control⁹ | 7″ interactive touchscreen (1280 × 800 resolution) Languages: English, German, French, Spanish, Italian, Japanese, Simplified Chinese |
| Alerts | Touchscreen alerts SMS/email via Dashboard Speaker audio alerts |
| Sensors & Control Systems | – Resin heating with IR sensing – Ultrasonic Resin Level Sensor – Z-Axis Force Sensor – Resin Cartridge Load Cell – Printer Leveling Sensor – Integrated Camera |
| Camera | 5MP (2592 × 1944) Remote monitoring, timelapses, history Disable/cover/remove option |
| Software | PreForm, Dashboard |
| PreForm System Requirements | – Windows 10 (64-bit, ARM not supported) & up – macOS 10.15 & up – OpenGL 2.1 – Microsoft C++ runtime (Windows only) – 4 GB RAM (8 GB recommended) |
| PreForm File Types | Input: STL, OBJ, 3MF Output: FORM |
| PreForm Print Setup Features | – One-Click Print – Adaptive layer thickness – Remote Print – Auto-orient – Auto-mesh repair – Auto & manual support generation – Rotate, scale, duplicate, mirror – Layer slicer inspection – Custom print settings – Multi-language support |
| Dashboard Printer Management | – Cloud-based management – Track resin & tank usage – SMS/email alerts – Enterprise group accounts |
| Resin Tank Estimated Lifetime¹⁰ | 75,000+ layers ~340 prints (22 mm tall, 100 µm) |
| Light Processing Unit Estimated Lifetime¹¹ | 600k–1.9M layers ~5,000 prints (22 mm tall, Grey Resin V5, 100 µm) |
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