
Clear Resin V5 Technical Data Sheet
Clear Resin V5 is an exceptionally clear and color-neutral General Purpose Resin, offering an optimal balance of fast print speed, high dimensional accuracy, and presentation-ready appearance.
Clear Resin V5 creates highly transparent and colorless parts that can be polished to near optical transparency. Create parts that are stiff and strong with a smooth surface finish that rivals acrylic.
Clear Resin V5 Technical Data Sheet
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Clear Resin V5 is an exceptionally clear and color-neutral General Purpose Resin, offering an optimal balance of fast print speed, high dimensional accuracy, and presentation-ready appearance.
Clear Resin V5 creates highly transparent and colorless parts that can be polished to near optical transparency. Create parts that are stiff and strong with a smooth surface finish that rivals acrylic.
Compatibility and Post-Processing
Post-Processing
| Step | Recommended Hardware | Standard Cure Profile |
Max-Strength Cure Profile1 |
|---|---|---|---|
| Washing2 | Form Wash/L V2 | 5 minutes or until clean | |
| Drying3 | -- | 10 min | |
|
Post-Curing |
Form Cure/L V1 | 5 min at room temperature |
15 min at 60 °C |
| Form Cure/L V2 | 1 min at room temperature |
4 min at 60 °C | |
- The Max Strength cure profile uses an exteneded, heated cure to improve the strength, stiffness, and temperature resistance of the final parts.
- Clear Resin V5 can be washed with either IPA or Formlabs Resin Washing Solution.
- When using Resin Washing Solution, an aditional an additional 30-60 second soak in water is required after washing, followed by drying for 4-6 hours or by drying with compressed air.
- For the best surface finish, Formlabs recommends allowing parts printed in Clear Resin V5 to air dry for at least 10 minutes after washing, before handling.
Hardware Compatibility
| Platform | Printer | Compatibility | Validated Layer Heights |
|---|---|---|---|
| Form 4 | Form 4 | Compatible | 0.1 mm 0.05 mm 0.025 mm |
| Form 4B | |||
| Form 4L | |||
| Form 4BL | |||
| Form 3 | Form 3 | Not Compatible use Clear Resin V4.1 |
|
| Form 3B | |||
| Form 3L | |||
| Form 3BL | |||
Mechanical Properties
Tensile Properties
|
|
Tensile Properties (Heated Post-Cure for Improved Strength)2 |
Max-Strength Cure Profile (Cure V1) |
Max-Strength Cure Profile (Cure V2) |
Method | |
|---|---|---|---|---|
| Ultimate Tensile Strength | 60 MPa (8702 psi) |
58 MPa (8410 psi) |
ASTM D638-14 | |
| Tensile Modulus | 2750 MPa (399 ksi) |
2700 MPa (392 ksi) |
ASTM D638-14 | |
| Elongation at Break | 8% | 11% | ASTM D638-14 |
Flexural Properties
| Green | Standard Cure Pofile6 | Max Strength Cure Profile6 | Method | |
|---|---|---|---|---|
| Flexural Strength | 83 MPa (12038 psi) |
92 MPa (13343 psi) |
105 MPa (15229 psi) |
ASTM D790-15 |
| Flexural Modulus | 2100 MPa (305 ksi) |
2450 MPa (355 ksi) |
2700 MPa (392 ksi) |
ASTM D790-15 |
Impact Properties
| Green | Standard Cure Profile6 | Max-Strength Profile6 | Method | |
|---|---|---|---|---|
| Notched Izod | 32 J/m (0.598 ft-lb/in) |
29 J/m (0.542 ft-lb/in) |
29 J/m (0.542 ft-lb/in) |
ASTM D256-10 |
| Gardner Impact Strength 1.6 mm (1/16 in) thickness |
-- | <0.1 J (<2 in*lb) |
<0.1 J (<2 in*lb) |
ASTM D5420-21 |
Fracture Properties
| Standard Cure Profile6 | Max-Strength Cure Profile6 | Method | |
|---|---|---|---|
| Maximum Stress Intensity Factor (Kmax) |
0.63 MPa m0.5 (573 psi in0.5) |
-- | ASTM D5045-14 |
| Work of Fracture (Wf) | 26.7 J/m2 (1.82 ft-lb/ft²) |
-- | ASTM D5045-14 |
General Properties
|
Standard Cure Profile6 |
Max-Strength Cure Profile6 | Method | |
|---|---|---|---|
| Shore Hardness | 78 D | 80 D |
ASTM D2240-15 |
| Printed Density | 1.21 g/cm3 (0.0437 lb/in3) |
1.21 g/cm3 (0.0437 lb/in3) |
ASTM D792 |
Representative Tensile Curve
Samples were tested following ASTM D638, Type I. The curve is a single sample chosen as representative and may not be representative of the average values of stress and strain. Samples were conditioned in a laboratory environment at 23°C, 50% relative humidity for 48 hours prior to testing.
Formlabs Clear Resin V5 Representative Tensile Curve

Single Sample ASTM D638 Type 1 Bar Conditioned 23°C 50% RH
Thermal & Electric Properties
Thermal Properties
| Green | Standard Cure Profile6 | Max-Strength Cure Profile6 | Method | |
|---|---|---|---|---|
| Glass Transition Temp (Tg) | -- | 96 °C (205 °F) |
96 °C (205 °F) |
ASTM D4065 |
| Heat Capacity at 25 °C | -- | 1.8 J/g*K (0.430 BTU/lb-°F) |
-- | ASTM E1269 |
| Coefficient of Thermal Expansion (-30-140 °C) | -- | 114.1 μm/m/°C (63.4 µin/in-°F) |
-- | ASTM E831-19 |
| Thermal Conductivity | -- | 0.540 W/m*K (3.75 BTU-in/hr-ft²-°F) |
0.540 W/m*K (3.75 BTU-in/hr-ft²-°F) |
ASTM E1530-25 |
| Heat Deflection Temp. @ 1.8 MPa | 47 °C | 49 °C (120 °F) |
59 °C (138 °F) |
ASTM D648-16 |
| Heat Deflection Temp. @ 0.45 MPa | 52 °C | 56 °C (133 °F) |
74 °C (165 °F) |
ASTM D648-16 |
Electrical Properties
| Green | Standard Cure Profile6 | Max-Strength Cure Profile6 | Method | |
|---|---|---|---|---|
| Surface Resistivity | -- | >1x10^12 Ω/sq | >1x10^12 Ω/sq | ASTM D257 |
| Comparative Tracking Index | -- | 600 V | -- | ASTM D3638 |
| Dielectric Strength4 | -- | 16.3 kV/mm (415 V/mil) |
-- | ASTM D149-20 |
| Dielectric Constant (k')4 | -- | 4.28 @ 1 MHz | -- | ASTM D150-22 |
| Dielectric Dissipation (D)4 | -- | 0.036 @ 1 MHz | -- | ASTM D150-22 |
Dynamic Mechanical Analysis (DMA)
Clear Resin V5 Loss Modulus, Storage Modulus and tan 𝛿
A DMA curve from -20 °C to 170 °C at 3 °C/min is shown.

Thermal Expansion by TMA
Sample was tested by ASTM E831-19 in a TMA. Ramp rate was 5 °C/min with a Ultra-High Purity Nitrogen purge of 50 cc/min.

Chemical Compatibility
Solvent Weight Gain
Percent weight gain over 24 hours for a printed and post-cured 1 x 1 x 1 cm cube immersed in respective solvent:
| Solvent | 24 hr weight gain (%) |
|---|---|
| Acetic Acid 5% | 0.9 |
| Acetone | 5.1 |
| Bleach ~5% NaOCl | 0.7 |
| Butyl Acetate | 0.3 |
| Diesel Fuel | 0.1 |
| Diethyl glycol monomethyl ether | 1.1 |
| Hydraulic Oil | 0.1 |
| Hydrogen peroxide (3%) | 0.9 |
| Isooctane | <0.1 |
| Isopropyl Alcohol | 0.3 |
| Mineral oil, heavy | 0.2 |
| Mineral oil, light | 0.2 |
| Salt Water (3.5% NaCl) | 0.8 |
| Skydrol 5 | 0.7 |
| Sodium hydroxide solution (0.025% pH = 10) | 0.8 |
| Strong Acid (HCl Conc) | 0.5 |
| TPM | 0.5 |
| Water | 0.9 |
| Xylene | <0.1 |
Mechanical Properties after Immersion (ASTM D543)
Tested for chemical compatibility according to ASTM D543. The influence of various chemicals was tested by measuring tensile modulus and strength after different exposure times. Exposed samples were stored in containers and fully immersed in the test chemicals for 1 day and 1 week. After removal, exposed samples were washed and conditioned for 24 hours at 22°C before mechanical testing. Mechanical testing was conducted according to ASTM D638 using Type 4 tensile samples at standard lab conditions (22°C). Results are reported as a % difference from the measured values of non-exposed samples.
Results are from samples tested in Grey V5. These results are expected to follow the same trends and be approximately the same, however some results may vary.
1 Day Immersion
| Solvent | Relative Modulus | Relative Strength | Relative Elongation | Relative Mass |
|---|---|---|---|---|
| IPA | 104.54% | 98.58% | 132.33% | 100.48% |
| Acetone | 21.02% | 20.08% | 152.24% | 109.38% |
| NaOH | 97.89% | 92.69% | 80.42% | 101.08% |
| HCl | 97.02% | 93.37% | 104.23% | 100.94% |
| DI Water | 88.63% | 89.21% | 105.36% | 101.38% |
| H2O2 | 86.20% | 87.54% | 103.71% | 101.57% |
| Bleach | 91.55% | 91.87% | 101.29% | 101.14% |
| Diesel | 98.79% | 99.48% | 125.45% | 100.11% |
| Motor Oil | 94.86% | 100.27% | 104.11% | 100.63% |
| Skydrol 5 | 92.77% | 100.85% | 119.69% | 100.90% |
1 Week Immersion
| Solvent | Relative Modulus | Relative Strength | Relative Elongation | Relative Mass |
|---|---|---|---|---|
| IPA | 88.43% | 86.98% | 115.87% | 101.71% |
| Acetone | Sample Disintegrated | Sample Disintegrated | Sample Disintegrated |
Sample Disintegrated |
| NaOH | 77.38% | 80.26% | 67.19% | 102.46% |
| HCl | 84.07% | 83.14% | 76.80% | 102.09% |
| DI Water | 65.29% | 67.62% | 83.53% | 103.23% |
| H2O2 | 62.66% | 62.75% | 91.67% | 103.63% |
| Bleach | 77.78% | 77.60% | 58.92% | 102.67% |
| Diesel | 100.45% | 101.34% | 101.63% | 100.09% |
| Motor Oil | 102.62% | 103.32% | 84.20% | 100.14% |
| Skydrol 5 | 104.59% | 105.93% | 87.22% | 100.79% |
Bar Charts of Properties after Immersion

Optical Properties
| Standard Cure Profile6 |
Max-Strength Cure Profile6 |
Method | |
|---|---|---|---|
| Refractive Index | 1.62 | 1.62 | ASTM D542-22 |
| Gloss Level (60°, XY) | 89 GU | -- | ASTM D523 |
| Gloss Level (60°, Z) | 24 GU | -- | ASTM D523 |
| Transmission @ 2 mm | 85 % | 85 % | ASTM D1003-21 |
| a* @ 2 mm | -4.02 | -4.31 | ASTM E 1348-15 |
| b* @ 2 mm | 7.52 | 5.58 | ASTM E 1348-15 |
| Transmission @ 10 mm | 59 % | 59 % | ASTM D1003-21 |
| a* @ 10 mm | -4.25 | -3.98 | ASTM E 1348-15 |
Transmission refers to the amount of visible light that passes through the part
a* and b* are more commonly associated with the CIELAB color space, where they denote axes for color measurement:
a* axis: Ranges from green to red, with negative values indicating green and positive values indicating red.
b* axis: Ranges from blue to yellow, with negative values indicating blue and positive values indicating yellow.
Light Transmission Curve
Light transmission was tested on a Varian Cary 50 Spectrophotometer from 200 to 1000 nm. Noise at high wavelengths is expected and may not be indicative of real fluctuations. The chosen sample was 3 mm thick, washed for 10 minutes in IPA and then cured for 1 minute in the Form Cure (2nd Generation). The surface was vertical and unpolished.
Light Transmission for Clear V5

Outgassing
The Outgas Test was performed in a vacuum environment of less than 5 × 10-5 torr according to ASTM E595, for a duration of 24 hours, at 125°C on three specimens per sample. Data was obtained using Grey Resin V5, and is expected to fall in the same approximate range. Some results may vary. Consult Grey Resin V5 TDS for information on printing and post-processing of samples.
| Outgassing | Standard Cure Profile6 |
|---|---|
| TML | 1.70% |
| CVCM | < 0.01% |
| WVR | 0.33% |
Footnotes
- Material properties may vary based on part geometry, print orientation, print settings, temperature, and disinfection or sterilization methods used.
- Data was obtained from parts printed on a Form 4 printer with 100 µm Clear Resin V5 settings, washed in a Form Wash V2 for 5 minutes in ≥99% Isopropyl Alcohol, and post-cured as according to the column header
- Data was obtained from parts printed on a Form 4 printer with 100 µm Clear Resin V5 settings, washed in a Form Wash V2 for 5 minutes in ≥99% Isopropyl Alcohol, and post-cured in a Cure V1 at with the specified curing profile
- Data was obtained using Grey Resin V5, and is expected to fall in the same approximate range. Some results may vary. Consult Grey Resin V5 TDS for information on printing and post-processing of samples.