This tool is available by appointment only.
You can schedule a time to receive training and use this tool by clicking the button at the top of the page. Please keep in mind that reservations can only be made within 2 weeks of the booking time. This tool is not available for walk-in usage and requires supervision by a Makerspace staff.
We have three Form 4B resin 3D printers, three Form Wash stations (each dedicated to a specific resin to prevent cross-contamination), one Form Cure station, and three resins available (See below for the list of available resins). An equal amount of resin is allotted to each Makerspace user every semester. Due to the material costs, resin usage is limited to original designs only.
No weaponry may be printed using the Makerspace printers (including toys).
If you have not used this equipment within 6 months, you must schedule an additional training for policy and procedure updates.
Form 4B Tech Specs
Masked Stereolithography (MSLA)
Light Source
Backlight Unit: 60 uniform-wavelength LEDs, a plano-convex lens array, and integrated air cooling
405 nm optical wavelength
16 mW/cm² optical power intensity delivered to the cure plane
50 µm pixel size
Typical Dimensional Tolerances³
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)
On average 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
Build Volume (W x D x H)
20.0 × 12.5 × 21.0 cm
7.9 × 4.9 × 8.3 in
5.25 liters
Build Area
250 cm²
38.8 in²
Maximum Part Length
27.3 cm
10.7 in
XY Resolution
50 µm with pre-tuned anti-aliasing for subpixel resolution
Superior fine feature performance and sharp features compared to the Form 3B Series
Layer Thickness
25–200 µm
0.001–0.008 in
Resin Usage
While the Form 4B is compatible with a wide variety of resins, the Makerspace provides a limited stock of resin for free to all Hopkins affiliates. An equal amount of resin is allotted to each Makerspace user every semester. Due to the material costs, resin usage is limited to original designs only.
Currently available resin:
To use a resin outside of what the Makerspace provides, users must purchase their own Form 4B Resin Cartridge, Form 4B Tank, Form 4B Tank Mixer, and Form 4B Build Platform. Please contact the Makerspace Manager for more details.