Form 4B
Formlabs Form 4B
Ultra-fast, clinically precise 3D printing for modern dentistry
Form 4B uses Low Force Display™ (LFD) technology for same-day production of dental models, aligners, splints, surgical guides, and medical parts. Its large build platform prints up to 75 models at once, cutting labor and boosting output for high-volume workflows. With easy onboarding, automation, and support for all Formlabs resins (including biocompatible) plus Open Material Mode, it delivers unmatched efficiency for both prototyping and production.
Key Features of Form 4B
Blazing Speed
Prints 11 dental models in just 9 minutes; over 400 models in 8 hours.
High Throughput
Fits up to 11 models per build—3× more than common dental printers.
Unmatched Accuracy
50 µm pixel size, anti-aliasing, and collimated light ensure precise fits (±100 µm).
Smooth Finish
Advanced LFD™ technology with light-touch supports delivers flawless surfaces.
Proven Reliability
98.7% print success rate, minimizing failures and downtime.
Material Flexibility
Open Material Mode supports Formlabs and third-party dental resins.
Scalable Production
Form 4BL produces 100+ models per hour for high-volume workflows.
Advanced Technology
Powered by LFD™ with backlight unit and collimating lenses.
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 4 (LPU 4) – Release Texture – Flexible Film Resin Tank – Intelligent Control Systems – High-Speed Automatic Resin Handling |
| Light Source | – Backlight Unit: 60 uniform-wavelength LEDs, plano-convex lens array, integrated air cooling – 405 nm optical wavelength – 16 mW/cm² optical power intensity at cure plane – 50 µm pixel size |
| Maximum Print Speed¹ | 100 mm/hr (3.9 in/hr) |
| Typical Print Speed² | – Average: 40 mm/hr (1.6 in/hr) across all materials – Range: 16–50 mm/hr (0.6–2.0 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: ±0.2% (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: – 99.7% of surfaces within 100 μm of CAD model – 95% of surfaces within 50 μm of CAD model – 69% of surfaces within 25 μm of CAD model |
| Reliability | 98.7% (independent third-party lab testing) |
| Materials | 38 Formlabs materials (including 15 biocompatible) + Open Material Mode for 3rd-party resins |
| Biocompatible Materials | Yes |
| Build Volume (W × D × H)⁵ | 20.0 × 12.5 × 21.0 cm (7.9 × 4.9 × 8.3 in) 5.25 L |
| Build Area | 250 cm² (38.8 in²) |
| Maximum Part Length⁶ | 27.3 cm (10.7 in) |
| XY Resolution⁷ | 50 µm (with pre-tuned anti-aliasing for subpixel resolution) |
| Layer Thickness⁸ | 25–200 µm (0.001–0.008 in) |
| Resin Cartridges | 1 |
| 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) | 39.8 × 36.7 × 55.4 cm (15.7 × 14.5 × 21.9 in) |
| Minimum Access Dimensions (W × D × H) | 40.7 × 47.8 × 84.4 cm (16.0 × 18.8 × 33.2 in) |
| Printer Weight | 18.3 kg (40.4 lb) |
| Operating Environment | 18–28 °C (64–82 °F) |
| Power Requirements | 100–240 VAC 4.8 A 50/60 Hz 480 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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