UV epoxy resin
Frequently asked questions
Can UV epoxy resin be laser cut?
No: UV epoxy resin is not suitable for laser cutting. However, it releases toxic fumes — machining is not recommended.
Can UV epoxy resin be CNC machined?
With some limitations: UV epoxy resin can be CNC machined.
Can UV epoxy resin be 3D printed?
Yes, using Resin.
Is UV epoxy resin food safe?
No, UV epoxy resin is not considered food safe.
Physical properties
| Density | 1100.0–1200.0 kg/m³ |
|---|---|
| Tensile strength | 40.0 MPa |
| Glass transition (Tg) | 40.0 °C |
| Thermal expansion | 60.0 µm/m·K |
| Moisture absorption | Low |
Laser processing
Thermal decomposition of cured UV resin releases photoinitiator vapours (benzophenone, TPO), gaseous BPA, and other volatile organic compounds. HEPA + activated carbon extraction required.
CO₂: Thermoset: not processable with CO2 laser for cutting. Engraving on fully cured pieces produces irregular burning with toxic fumes. Not recommended.
Diode: Not applicable.
Fiber: Not applicable in maker contexts.
CNC / milling processing
On fully cured objects, UV resin is millable with solid carbide bits. The typically small dimensions of UV resin pieces limit CNC applications. Moderate speeds, low feed rates, dedicated extraction for fine particulate.
3D printing
Post-processing
Sanding: Excellent progressive sanding from 400 to 3000 grit with wet silicon carbide abrasive paper. Final polishing with automotive buffing compound or polish yields crystal-clear transparency.
Primer: No primer required for direct polishing. For painting over cured UV resin, sand at 320 grit to ensure mechanical adhesion.
Gluing: Liquid UV resin can be used as a one-component adhesive: apply between two transparent surfaces and irradiate with a 365 nm UV lamp. On opaque surfaces, irradiation cannot reach the joint and curing does not occur. For opaque joints, use two-component epoxy resin.
Over time: Decent chemical resistance once cured. Without UV stabilizers, it yellows upon exposure to sunlight within a few months. Formulations with HALS and UV filters significantly extend service life. Less heat-resistant than two-component resins (lower Tg).
Common defects
- Partial cure at depth — UV does not penetrate beyond 3–5mm in standard formulations; irradiate in successive layers
- Tacky surface after cure (oxygen inhibition) — irradiate without oxygen or use anti-oxygen formulations
- Rapid yellowing without UV-stabilising additives in low-cost formulations
- Air bubbles in thick pieces — allow 5 minutes rest after pouring before UV exposure
Safety
Recommended PPE: gloves_nitrile, eye_protection_uv, mask_a1
UV resin in liquid form contains photoinitiators (e.g., TPO, benzophenone) that are skin sensitizers and photosensitizers. Avoid skin contact by using nitrile gloves. Do not expose liquid resin to UV light without eye protection: 365 nm UV radiation is carcinogenic to the retina. Adequate ventilation during processing.
Availability and formats
Commercial formats: bottles 30ml, 100ml, 500ml, single-dose syringe/dispenser 10ml, coloured, fluorescent or glitter-pigment formulations
Related materials
Sources
- Solarez UV Resin — Technical Information Sheet
- ANYCUBIC Resin Safety Data Sheet
- UVtools documentation — Resin properties database
Information on compatibility, processing parameters and safety is purely indicative. MakerSpecs accepts no liability for damage to persons or property arising from the use of this data. Always check the safety rules and the manufacturer's official manuals before carrying out any processing.