| Instructions for Application of Strong and Tough Resin ST6375T (Transparent) | Publish date: 2025.07.23 | Version: V1.0 |
¶ Material Information
¶ Overview
This is a material combining high-performance and toughness with excellent tensile and flexural properties, achieving an outstanding balance between rigidity and toughness. Suitable for producing functional components that are not easily bent and are durable. With its remarkable impact resistance, it has become an ideal choice for eyewear applications.
¶ Recommendations on Applications
Eyeglass frames, temples, and other vertical applications in eyewear.
Durable and shock-resistant parts such as consumer electronics enclosures and automotive interior structural components.
Impact-resistant items such as protective gear shells and hammers.
¶ Precautions
Before printing, check whether the resin tank's release film (at the bottom) is good. In case of facing with issues such as print failures or partial missing areas, check the tank first. In case of issues like deformation, blushing, or severe wear, replace the release film.
¶ Performance
| Basic Properties of UltraPrint- HeyGears UltraCraft ST6375T (Transparent) | |||
| Categories | Properties | Criteria | Value |
| Rigidity | Tensile Strength (MPa) | ASTM D638 | 42 |
| Flexural Strength (MPa) | ASTM D790 | 63 | |
| Flexural Modulus (MPa) | ASTM D790 | 1400 | |
| Impact Strength (Notched) (J/m) | ASTM D256 | 75 | |
| Essential Work of Fracture (J/m^2)) | ISO 20795 | 12719 | |
| Heat resistance | Heat deflection temperature (0.45Mpa) (℃) | ASTM D648 | >57 |
| Mechanical | Shore D Hardness | ASTM D2240 | 74 |
| Viscosity (mPa·s) | ASTM D4212 | 6800 | |
| Water Sorption (%) | ASTM D570 | 0.45 | |
Note: The properties were results of testing with HeyGears UltraCraft Cure curing machine in Performance mode.
¶ Design Suggestions
| Construction performance | |
|---|---|
| Items | Value |
| Gap width (mm) | 0.2 |
| Overhang length (mm) | 1.2 |
| No support offset (°) | 25 |
| Wall thickness (mm) | With baffle: 0.18 No baffle: 0.22 |
| Hole diameter (mm) | 0.4 |
| Pillar diameter (mm) | 0.4 |
| Islands | 0 |
Note: The table presents the design requirements to guarantee at least the minimum construction performance of the material. Design parameters below them would lead to detail missing or print failure.
¶ Recommended Design Parameters
Design parameters are recommended below for various kinds of structures which guarantee the printing success rate.
¶ Thickness of Thin Wall Structures
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| Recommended values | |||||
| Thin wall area (mm2) | 5*5 | 10*10 | 50*50 | ||
| Min. thickness of wall that provides support (mm) | 0.3 | 0.4 | 1.0 | ||
| Min. thickness of wall that does not provide support (mm) | 0.4 | 0.4 | 1.2 | ||
| Typical scenarios: |
1. Electronic and electrical enclosures and structural components; 2. Models with thin-walled structures. |
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| Testing method by HeyGears: |
1. The test was finished within 2 hours after washing and part removal; 2. The printed object was visually inspected, from the thinnest to the thickest areas, whether it was intact with no obvious deformation or misalign lines. |
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¶ Hole
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| Types: | Straight, bent, blind | ||||
| Hole Depth (mm) | 2 | 10 | 30 | 40 | 50 |
| Min. inner diameter of straight hole (mm) | 0.3 | 0.4 | 0.7 | 0.8 | 0.9 |
| Min. inner diameter of bent hole (mm) | / | 1.0 | ＞2 | ＞2 | ＞2 |
| Min. inner diameter of blind hole (mm) | 0.6 | 0.7 | 1.5 | 1.5 | 1.5 |
| Typical scenarios: |
1. Models with special structures; 2. Small tubes and details; 3. Industrial assembly parts. |
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| Testing method by HeyGears: |
1. All holes were completely cleaned (washed and dried for about 3~5 times); 2. Straight holes: HeyGears team directed the light source at the holes from one end, inspected at the other end to see if the light could be seen, and recorded the minimum data that passed the test; 3. Blind holes: HeyGears team pointed a wire through the holes to see if it could reach the bottom (the other end), and recorded the minimum data that passed the test; 4. Bent holes: HeyGears team blew in the holes from one end with an air blow gun or an injector, inspected if the holes were ventilated, and recorded the minimum data that passed the test.** |
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¶ Pillar
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| Types: | Pillars providing supports and not providing supports | ||||
| Depth/Height (mm) | 7 | 10 | 20 | 40 | 50 |
| Min. diameter of pillar providing supports (mm) | 0.7 | 0.9 | 1.0 | 1.2 | 1.4 |
| Max. diameter of pillar providing supports (mm) | 0.8 | 0.8 | 1.0 | 1.4 | 1.6 |
| Typical scenarios: |
1.Positioning pins, connection of assembly parts; 2.Details and tubes; 3.Thin long structures. |
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| Testing method by HeyGears: |
1. The test was finished within 2 hours after part removal, washing and curing; 2. The printed object was visually inspected to see if it was intact with no obvious deformation or misalign lines; 3. The minimum data that passed the test was recorded. |
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¶ Width of Raised & Depressed Details
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| Types: | Raised and depressed | ||||
| Depth (mm) | 0.3 | ||||
| Min. width of depressed details (mm) | ＞0.08 | ||||
| Min. width of raised details (mm) | ＞0.04 | ||||
| Typical scenarios: |
1.Tagged text; 2.Special texture. |
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| Testing method by HeyGears: |
1. The test was finished after part removal, washing, and curing; 2. The printed object was visually inspected to see if the details were intact and clear with no obvious missing; 3. The minimum data that passed the test was recorded. |
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Note: The minimum dimensions of details cannot be retrieved due to this material's characteristics.
¶ Drain Hole
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| Types: | Any type of drain holes in hollowed structures | ||||
| Size of the area to add drain holes (mm²) | 10*10 | 20*20 | 30*30 | ||
| Min. diameter of drain hole (mm) | 1.2 | 2.0 | 2.0 | ||
| Typical scenarios: | 1.Drain holes in hollowed structures. | ||||
| Testing method by HeyGears: |
1.During washing, the printed object was washed and blown dry 5 times for testing; 2.The holes were visually inspected to see if they had been cleaned completely with no resin or misalign lines; 3.The minimum data that passed the test was recorded. |
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¶ Acute Angle
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| Types: | Acute parts of various wall thickness | ||||
| Wall thickness (mm) | 1 | 2 | 3 | 4 | 5 |
| Smallest acute angle (°) | 25 | 25 | 20 | 20 | 20 |
| Typical scenarios: | 1.Acute parts | ||||
| Testing method by HeyGears: |
1.The test was finished within 2 hours after part removal and washing; 2.The printed object was visually inspected to see if the acute parts were intact with no obvious deformation or misalign lines; 3.The minimum data that passed the test was recorded. |
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¶ Gap
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| Types: | Gaps between curved parts and gaps between flat parts | ||||
| Depth/Height of curved part (mm) | 5 | 10 | 15 | ||
| Gap width (mm) | 0.2 | 0.2 | 0.2 | ||
| Depth/Height of flat part (mm) | 5 | 10 | 20 | ||
| Gap width (mm) | 0.15 | 0.2 | 0.15 | ||
| Typical scenarios: |
1.One-piece structure (gears) 2.Details on surface, texture structures. |
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| Testing method by HeyGears: |
1.The test was finished within 2 hours after part removal, washing (no curing); 2.Printed connection parts were visually inspected if they could be separate intactly. 3.The minimum data that passed the test was recorded. |
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¶ Gap in Connections
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Gap in Connections
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| Results | Fit, tight, loose | |||
| Images | Shapes | Tight (mm) | Fit (mm) | Loose (mm) |
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Square | -0.2 | 0 | 0.02 |
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Circle | -0.04 | -0.02 | 0 |
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Ball | ＜-0.8 | -0.05 | -0.03 |
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Polygonal | 0.02 | 0.04 | 0.06 |
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C-shaped/U-shaped | 0.2 | 0.4 | 0.6 |
| Testing method by HeyGears: |
1. Test was done after part removal, washing and curing; 2. Column-shaped connection structures were taken out from the sprue; 3. The structures were assembled, from the loosest ones to the tightest ones (the order might differ due to subjective thoughts); 4. Data was recorded according to the assembly results. |
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¶ Tolerance
| Printed dimensions and tolerances |
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| Types: | Any structure | ||
| Printed dimensions and tolerances(mm) | 20 | 50 | 100 |
| Tolerance(mm） | 0.05 | 0.2 | 0.3 |
| Testing method by HeyGears: |
1.Thin walls or other special structures were not considered; 2.Measurement was done within 2 hours after part removal, washing and curing; 3. Printing parameters were the same when using Pulsing Release Resin Tank and using regular resin tank. |
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¶ Process and Configuration
¶ Support Parameters
| Support parameters (printing with regular resin tank) | |||
| Support areas | Parameter items | Default values | |
| Support body | Lift height (mm) | 5 | |
| Trunk diameter (mm) | 0.9 | ||
| Overhang angle (°) | 45 | ||
| Support density | Anchor distance (mm) | 2 | |
| Border anchor distance (mm) | 2 | ||
| Connection | Top diameter (mm) | 0.26 | |
| Connection length (mm) | 1.5 | ||
| Contact | Contact shape | Sphere | |
| Diameter (mm) | 0.32 | ||
| Embedded depth (mm) | 0.22 | ||
¶ Parameters for Slicing in Other Slicer Software (Not Recommended)
| Chitubox (printing with regular resin tank) | ||
| Support areas | Parameter items | Default values |
| Basic parameters | Lift height (mm) | 5 |
| Raft shape | Cross grid | |
| Raft thickness (mm) | 1 | |
| Overhang angle (°) | 45 | |
| Support density | Anchor distance (mm) | 1.5 |
| Connection | Top diameter (mm) | 0.5 |
| Connection length (mm) | 2 | |
| Trunk diameter(mm) | 1.2 | |
| Contact | Contact shape | Sphere |
| Diameter (mm) | 0.6 | |
| Embedded Depth (mm) | 0.3 | |
| Voxeldance Tango (printing with regular resin tank) | ||
| Support areas | Parameter items | Default values |
| Basic parameters | Z lift height (mm) | 5 |
| Raft shape | Convex hull | |
| Raft thickness (mm) | 1 | |
| Overhang angle (°) | 45 | |
| Support density | Anchor distance (mm) | 1.5 |
| Connection | Top diameter (mm) | 0.5 |
| Connection length (mm) | 2 | |
| Trunk diameter(mm) | 1.2 | |
| Contact | Contact shape | Sphere |
| Diameter (mm) | 0.60 | |
| Embedded depth (mm) | 0.30 | |
Note: It's advised to use a “safer” parameter configurations and have some tests first, as HeyGears printers cannot guarantee a high printing success rate for models sliced with a third-party slicer software which does not enjoy HeyGears print strategies.
¶ Washing
| Material Cleaning Parameters | ||||
| Material | Cleaning devices | Washing settings | Cleaning solutions | Washing time |
| ST6375T | HeyGears UltraCraft Wash | Rotation speed 250/min | 95% IPA | 5min rough wash + 2min fine wash |
| Ultrasonic Cleaner | Power 240Kw | 95% IPA | 5min rough wash + 2min fine wash | |
Note 1: Rough wash refers to the behavior of washing off most liquid resin on the printed object with used alcohol (used for more than 3 batches of prints); Fine wash refers to the behavior of well cleaning details of the printed object with clean alcohol (used for less than 3 batches of prints).
Note 2: Washing finished, it's advised to blow dry the print with compressed air or bake it dry in a baker at 45℃ for 10min. Please AVOID submerging the print in alcohol for a long time (over 10 min in total)）, which might impact the resin's performance and the print's dimension.
¶ Curing
| Recommended processes | ||||
| Material | Curing mode | Heat or not | Curing medium | Settings |
| ST6375T | Performance | Yes | Air | 60℃ for 60min |
Note: Cure the print with HeyGears UltraCraft Cure. It’s advised to send the curing job from HeyGears Blueprint to the device first and then start curing on the device, as the job sent from Blueprint would enjoy a more advanced curing process and have an even better curing result.
¶ Operation Steps
¶ Slicing in Blueprint Studio
| Step 1: Enter Slicer in Blueprint Studio. | Step 2: Choose the corresponding material. |
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| Step 3: Import models in a new project by clicking Import icon or directly dragging models to the Studio. | Step 4: In the Prepare page, use Rotate, Scale, Hollow, Hole, Label, Duplicate and other tools based on your needs. |
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| Step 5: Run Auto-layout or do it manually by yourself. | Step 6: Run Auto-support, choose Truss support and generate supports. |
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| Step 7: Run Slicing. You may edit the slice file name if needed. | Step 8: After slicing is done, you may check slice files and send print jobs at the [Slice Files] page. |
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¶ 5. Finishing
¶ 5.1 Removing Supports
For most models, removing by hand will be fine (twisting off the support structures).
For models with thin walls or with supports at corners/gaps, it's better to remove with tools (pliers or art knife, tweezers).
¶ 5.2 Sanding and Spray-Painting
Grind off some support remains on printed models to make their surface smooth.
Grinding by hand
Use wet sandpaper (from 400 mesh to 1200 mesh) to grind off layer lines and support remains. It's advised to use sandpaper that is 200 mesh finer every time switching to finer sandpaper, and grind off scratches made by previous sandpaper. After grinding with 1200 mesh sandpaper, the surface of the print part will look fine and matte.
Washing
Wash off the dust from grinding with water first. Wipe off the dust and fingerprints until clean with microfiber cloth and IPA/95% alcohol.
¶ Precautions
¶ 6.1 Precautions and Warnings
Please make sure to keep on protective wear (protective gloves and goggles) during the process.
Please avoid direct contact with liquid resin or the print parts after curing, to prevent irritation to the eyes or skin (which might cause sensitization).
If the product gets into the eyes, rinse immediately with clean water and contact a doctor.
If the product contacts with your skin, rinse immediately with clean water and wash thoroughly with soap.
The product should only be used after training by qualified personnel.
After each use, please be sure to immediately close the bottle cap to keep the bottle sealed.
Before use, please shake the resin well and it’s recommended to stir the resin in the resin tank before printing, to ensure that there is no significant sediment of the color powder.
After pouring into the resin tank, the resin should be kept away from light. If not printed for 3 days, the resin should be filtered and poured back into the resin bottle, avoiding staying for more than 7 days in the resin tank to prevent moisture absorption and degradation, which could lead to print failures.
¶ 6.2 Storage and Transportation
The product should be stored in an indoor environment with a temperature of 15°C ~ 28°C, free from corrosive gases, well-ventilated, and protected from high temperatures, humidity, and direct sunlight.
The product should be transported in an environment with a temperature of 0°C ~ 45°C, and during transportation, it should be protected from heavy pressure, direct sunlight, and exposure to rain or snow.
The shelf life of the product is 18 months..
¶ 6.3 Disposal
Please refer to the MSDS for precise information. Liquid resin should not be directly discharged. Please allow it to be fully cured into a solid under sunlight before disposing of it according to local regulations.