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Transparent Resin (acrylic-like resin) is a photosensitive polymer that maintains high light transmittance and a low yellowing index after UV curing. It belongs to the SLA/LCD/DLP vat photopolymerization family of 3D printing materials. Its defining characteristic is a cured texture that closely resembles acrylic and glass, making it suitable for transparent housings, light-guiding elements, and structural assembly verification prototypes.
Transparent resins typically employ low-chroma monomers and aliphatic urethane acrylate oligomers to minimize yellowing caused by UV curing at the formulation level. Light transmittance in the visible spectrum generally exceeds 90%, with a refractive index of approximately 1.49-1.52, approaching the optical performance of ordinary glass. Unlike standard resins, which may appear slightly yellow or translucent after curing, transparent resins are engineered for extreme clarity and color neutrality.
Light transmittance in the visible spectrum typically exceeds 90%, with a cured clarity close to glass and acrylic.
Formulated with low-chroma monomers and aliphatic urethane acrylate oligomers to control post-cure yellowing.
Refractive index of approximately 1.49-1.52, approaching ordinary glass for light-guiding and optical display applications.
Sanding, polishing, and UV clear-coat spraying can achieve optical-grade transparency, further improving clarity.
Post-cure transmittance exceeds 90%, with a texture rivaling acrylic and glass, ideal for transparent housings and concept prototypes.
Low-chroma formulation keeps the yellowing index low after UV curing, maintaining clarity over extended use.
Unlike brittle optical plastics, transparent resin combines toughness with clarity, making it suitable for structural assembly verification.
Vat photopolymerization produces extremely fine layer lines and smooth surfaces, with crisp internal and edge details on transparent parts.
Sanding, polishing, and UV clear-coat spraying can achieve optical-grade transparency, further elevating clarity.
Quickly prints transparent housings, fluid channels, and concept parts for assembly verification and visual validation.
Can produce lenses, light-guiding elements, and lampshades with genuine optical function, expanding functional validation scenarios.
eSUN (Esun Industrial Co., Ltd.) continues to invest in photosensitive resin R&D, addressing the industry challenge of "clear but not yellow, clear but not brittle" in transparent printing with an acrylic-like transparent resin that balances high transmittance, yellowing resistance, and high toughness.
Transmittance above 90%, with a texture rivaling acrylic and glass.
Low-chroma formulation keeps the post-cure yellowing index low.
Combines transparency with impact resistance for assembly verification.
Fine layer lines and clear internal and edge details on transparent parts.
Sanding, polishing, and UV clear coat can achieve optical-grade transparency.
| Characteristic | Description | Impact |
|---|---|---|
| Light Sensitive | Prolonged light exposure may cause yellowing or property changes | Must be stored away from light; not suitable for long-term direct strong light exposure |
| Complex Post-Processing | Requires progressive sanding, polishing, and UV clear-coat spraying for optimal transparency | High process requirements increase production time and labor costs |
| Limited Yellowing Resistance | Yellowing control under long-term UV exposure is a core challenge and cannot be fully eliminated | Transparency gradually declines in long-term outdoor or high-UV environments |
| Requires Specialized Equipment | Needs a vat photopolymerization printer and UV post-curing equipment | Equipment and consumable costs are higher than FDM processes |
| Limited Heat Resistance | Photosensitive resins generally have lower heat resistance than engineering thermoplastics | Not suitable for high-temperature environments or load-bearing heated parts |
PM200 is eSUN's acrylic-like transparent resin, featuring high transmittance and yellowing resistance for room-temperature transparent parts with a texture rivaling acrylic and glass. Clarity improves further after sanding, polishing, or UV clear-coat spraying. The material offers high toughness and impact resistance with excellent internal light transmission, making it suitable for structural assembly verification and transparent appearance concept prototypes.
High transparency, yellowing resistance, high toughness.
Engineering-grade photosensitive resin.
Mechanical components, molds, toys, automotive, electrical and electronic parts.
| Industry | Typical Applications | Material Value |
|---|---|---|
| Optics and Lighting | Lenses, light-guiding elements, lampshades, optical display parts. | Refractive index close to glass and transmittance above 90% enable parts with genuine optical function. |
| Industrial Design and R&D | Transparent housings, fluid visualization models, structural assembly verification prototypes, concept appearance parts. | Rapidly validates transparent appearance and internal structure, shortening R&D cycles. |
| Automotive and Electronics | Transparent structural parts, housing prototypes, electrical and electronic component assembly verification. | High toughness and impact resistance combine transparency with structural function for engineering validation. |
| Architecture and Modeling | Architectural model glass facades, transparent structure displays, landscape models. | High-clarity texture reproduces glass effects, enhancing model presentation quality. |
| Art and Creative Design | Artworks, decorative pieces, customized transparent parts. | Transparent texture and detail fidelity support fine artistic creation. |
PM200 is used to print transparent housings and appearance concept parts with an acrylic-like texture for design reviews and client presentations.
The high toughness and impact resistance of PM200 enable structural assembly verification, allowing internal structures and assembly relationships to be observed.
Transparent resin prints fluid channel models, enabling direct observation of internal flow for engineering validation and teaching demonstrations.
Benchmark materials: Standard Resin, High-Strength Resin
| Comparison Dimension | Transparent Resin | Standard Resin | High-Strength Resin |
|---|---|---|---|
| Transmittance and Appearance | Transmittance above 90%, texture rivaling acrylic and glass | May appear slightly yellow or translucent after curing, with limited clarity | Typically opaque or translucent, prioritizing mechanical performance |
| Yellowing Resistance | Low-chroma formulation; yellowing resistance is a core advantage | Yellowing is more noticeable, prone to discoloration over time | Yellowing resistance not emphasized; focuses on toughness and strength |
| Mechanical Performance | Combines transparency with high toughness and impact resistance for assembly verification | General toughness, relatively brittle, suited for appearance validation | Optimal impact resistance and strength, suited for load-bearing and functional parts |
| Typical Applications | Transparent housings, light-guiding elements, assembly verification, artworks | Appearance prototypes, detail display, mock-up samples | Functional parts, jigs and fixtures, load-bearing structural parts, engineering validation |
| Post-Processing Difficulty | Requires progressive sanding, polishing, and UV clear coat; high process requirements | Simple post-processing, support removal only | Post-processing mainly sanding and finishing; moderate difficulty |
| Parameter / Operation | Recommended Value | Notes |
|---|---|---|
| Pre-Print Preparation | Thoroughly shake the resin | Ensures uniform composition and consistent transmittance |
| Support Distance | ≥ 3-5mm | Facilitates post-processing removal and avoids damaging transparent surfaces |
| Light Protection | Avoid prolonged light exposure | Prevents premature resin reaction and yellowing |
| Cleaning Method | High-concentration alcohol | Removes uncured resin residue from the surface |
| UV Post-Curing | 1-2 minutes | Excessive time causes yellowing; leaving the model can reverse it |
| Sanding and Polishing | 400-grit → 600-grit → 800-grit | Progressive sanding avoids deep scratches that affect transparency |
| Final Enhancement | Spray anti-UV clear coat / soak in transparent resin and post-cure | Achieves optimal transparency approaching optical-grade clarity |
The above parameters are for reference only. Actual settings should be adjusted step by step based on printer model, light source power, and model geometry. This guide does not replace the official parameter sheet for specific product specifications.