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eSUN UV Color Change technology embeds specialized micro-encapsulated photochromic compounds directly into 3D printing polymer matrices. In ambient indoor lighting, the printed objects showcase a clean, subtle semi-transparent beige or neutral tone. Upon exposure to ultraviolet (UV) radiation or natural sunlight, the material undergoes a rapid, reversible molecular shift that activates vibrant, saturated colors within seconds.
Instantly transitions from a neutral base tone to vivid colors under sunlight or UV light, providing dynamic visual feedback in a single print.
Color saturation and depth adjust dynamically to the intensity of UV radiation and length of light exposure.
Transitions back to its natural neutral state within minutes of returning indoors or away from direct sunlight without permanent fading.
Successfully adapted across both user-friendly PLA and high-toughness, weather-resistant PETG matrix formulations.
Breathe life into static models by making them react dynamically to natural sunlight and outdoor environments.
Formulated for modern high-speed 3D printers, delivering stable extrusion even at printing speeds up to 200 mm/s.
Enjoy two distinct aesthetic looks—an elegant indoor neutral appearance and a eye-catching outdoor saturated color.
Features low layer line visibility and easy support removal across both PLA and PETG product offerings.
Functions as a visual sensor to detect UV intensity in real-time for educational and outdoor accessories.
Utilizes sustainable PLA bases alongside recyclable PETG, ensuring safe, low-odor, non-toxic emissions during printing.
Following extensive research into functional thermochromic (temperature-sensitive) materials, eSUN expanded its light-responsive product line by perfecting photochromic dye stability across different thermoplastic bases including PLA and PETG.
Color change initiates within seconds when exposed to daylight or UV light sources.
Available in beginner-friendly PLA or durable, impact-resistant PETG depending on application needs.
Prints cleanly using standard brass nozzles without requiring hardened steel or enclosed chambers.
| Property / Issue | Description | Mitigation / Impact |
|---|---|---|
| Pigment UV Fatigue | Continuous outdoor exposure to direct sunlight over months can reduce color shift saturation. | Store spools and models away from direct sunlight when not in active use. |
| Temperature Limit | PLA versions soften above 52°C; PETG versions handle up to ~70°C. | Select PETG UV Color Change for parts exposed to moderate heat or outdoor moisture. |
| Moisture Sensitivity | Both polymers (especially PETG) absorb atmospheric moisture over time. | Keep filament stored with desiccant and dry at recommended temperatures before long prints. |
eSUN offers photochromic filaments across multiple base polymers and color options to accommodate diverse functional and aesthetic requirements.
Base: Semi-transparent Beige
UV State: Vibrant Sky Blue
Polymer: PLA (Easy print, smooth finish)
Base: Semi-transparent Beige
UV State: Deep Royal Purple
Polymer: PLA (Ideal for cosplay & figures)
Base: Semi-transparent Beige
UV State: Crimson Red
Polymer: PLA (High contrast for art pieces)
Base: Semi-transparent Neutral
UV State: Deep Marine Blue
Polymer: PETG (High toughness & chemical resistance)
Base: Semi-transparent Neutral
UV State: Vibrant Magenta/Purple
Polymer: PETG (Durable for outdoor gear)
Base: Neutral/Off-white
UV States: Yellow, Green, Orange, Fuchsia
Custom colors across PLA & PETG bases.
| Industry | Typical Application | Material Recommendation |
|---|---|---|
| Cultural & Creative Arts | Interactive sculptures, color-changing jewelry, custom keychains | PLA UV Color Change for detailed surface finish. |
| Outdoor & Sports Gear | Sun-exposure indicators, wearable sports accessories, bike tags | PETG UV Color Change for high impact strength and moisture resistance. |
| Entertainment & Props | Cosplay props, escape room hidden clues, stage theatrical items | PLA / PETG depending on structural handling demands. |
| STEM & Education | UV radiation detectors, solar science kits, light spectrum models | PLA UV Color Change for easy, safe classroom printing. |
| Feature / Parameter | PLA UV Color Change | PETG UV Color Change |
|---|---|---|
| Primary Advantage | Easiest to print, superior detail, low warping | High toughness, weather resistance, higher heat tolerance |
| Heat Deflection Temp (HDT) | ~52°C | ~70°C |
| Impact Strength | Moderate | High |
| Printability | Very High (5/5) | High (4/5) |
| Outdoor Environment Suitability | Short-term / Decorative | Long-term / Functional outdoor accessories |
| Nozzle Temperature | 190°C – 230°C | 230°C – 250°C |
| Parameter | PLA UV Color Change | PETG UV Color Change |
|---|---|---|
| Extruder Temperature | 190°C – 230°C | 230°C – 250°C |
| Bed Temperature | 45°C – 60°C | 75°C – 85°C |
| Print Speed | 50 – 200 mm/s | 40 – 120 mm/s |
| Cooling Fan Speed | 100% | 50% – 80% |
| Drying Recommendation | 55°C for >4 hours | 65°C for >5 hours |
| Retraction Distance | 0.8 – 2.0 mm (Direct Drive) | 1.0 – 3.0 mm (Direct Drive) |
* Disclaimer: Recommended parameters may vary depending on printer geometry, nozzle size, and ambient environmental conditions.