Since the release of Form 1, Formlabs has offered castable resins. Now, True Cast Resin enables users to leverage the speed, accuracy, and reliability of Form 4 stereolithography (SLA) 3D printers to create precise, detailed patterns for casting under 5 mm thick.
True Cast Resin integrates effortlessly into a wide range of burnout schedules with low thermal expansion, minimal shrinkage, and 0.03% ash content to ensure clean burnout and consistently excellent casting outcomes.
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True Cast Resin: Precise Patterns With Clean Burnout
Parts printed with True Cast Resin are highly accurate with crisp features, smooth surfaces, and exceptional detail, minimizing post-processing and finishing time.
Formlabs materials engineers applied the feedback from users of previous castable resins to develop True Cast Resin. This new wax-filled material is designed for precision casting of intricate jewelry and complex engineering components.
| Castable Wax Resin | Castable Wax 40 Resin | True Cast Resin | Clear Cast Resin | |
|---|---|---|---|---|
| Applications | Fine filigree, lightweight jewelry, and dental applications | Medium to heavy jewelry and small engineering components | Medium to heavy jewelry, medallions, figurines, and small engineering components up to 5 mm thick | Demanding engineering applications over 3 mm thick |
| Compatibility | Form 2 Form 3/+ Form 4 | Form 2 Form 3/+ | Form 4 | Form 2 Form 3/+ Form 4 |
Parts printed in True Cast Resin have low expansion and maintain surface integrity with no wax migration or residue over time, allowing for a more forgiving casting experience. Low thermal expansion, minimal shrinkage, and 0.03% ash content ensure clean burnout and consistently excellent casting outcomes.
Workflow
- Heat resin at 60 ℃ for 45 minutes in a low heat oven or water bath and shake. Then, insert the cartridge into the printer.
- Once the part is printed, wash in Form Wash for five minutes.
- Dry the part with compressed air.
- Post-cure the part for 3-10 minutes at room temperature.
- Prepare the part for casting by removing part supports, adding sprues, and attaching to a casting tree.
- Burnout and cast the part.
- Rescue part from the cast and clean, de-sprue, and finish.
This Frog Prince was cast in sterling silver and then set with stones.
Read the complete True Cast Resin Application Guide here.
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See and feel Formlabs quality firsthand. We’ll ship a free 3D printed sample part to your office.
Start Printing With True Cast Resin
From jewelry to small engineering components, True Cast Resin makes casting intricate and complex patterns easy, consistently delivering a clean burnout and excellent results. Formulated to print on Form 4 3D printers, users can achieve smooth surface finishes and exceptional detail at blazing print speeds.
Buy True Cast Resin to start printing or contact sales to learn more about printing on Form 4.

