Filament guideSome prints are meant to glow. Lamp shades, light diffusers and window pieces need a plastic that lets light through. Translucent PETG does that while staying tough enough for daily use. Here's what Bambu Lab's PETG Translucent is, what it's good for and how to design for it.
Quick answer
The short answer
PETG Translucent is a see-through, tinted PETG filament that Bambu has optimized for light transmission. It comes in eight colors, from translucent gray to teal, orange and pink.
It keeps the useful parts of PETG: heat resistance above PLA and resistance to water, UV and temperature changes, according to Bambu.
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What is translucent PETG?
PETG is naturally clear before color is added. Translucent PETG keeps most of that clarity and adds a light tint. The result looks like colored glass, though it won't be crystal clear.
That's because a 3D print is built from stacked lines of plastic. Each line edge scatters light. Bambu notes that how see-through a print looks depends on part size, wall thickness, print speed, nozzle temperature and infill.
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How it compares
Bambu's data shows PETG Translucent is tougher and more heat resistant than standard PETG HF, and less stiff.
| Bambu's test | PETG HF | PETG Translucent |
|---|---|---|
| Heat deflection temp | 69°C | 74°C |
| Impact strength | 31.5 kJ/m² | 37.4 kJ/m² |
| Bending strength | 64 MPa | 68 MPa |
| Bending modulus (stiffness) | 2,050 MPa | 1,610 MPa |
A heat deflection temperature of 74°C (165°F) matters for lighting. It gives more margin near a warm bulb than translucent PLA does. Use LED bulbs, which run much cooler than incandescent ones.
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What translucent PETG is good for
- Lamp shades, pendant covers and light diffusers
- Night lights and LED sign faces
- Suncatchers and window decor
- Vases and decorative vessels (for dry or faux flowers)
- Display pieces, prototypes and packaging mockups that need a glassy look
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Designing for translucency
- Thin walls glow more. One or two outer walls let the most light through. Thick, solid parts look cloudy.
- Infill shows. The internal pattern is visible through the walls. Either make the part hollow or plan for the pattern as part of the look.
- Expect texture, not glass. Layer lines catch the light. Many people like this, but if you need optical clarity, 3D printing isn't the right process.
- Test the color with the light. Tints look different lit from behind. A warm LED shifts colors toward amber.
For something easier to print with a softer glow, see translucent PLA. For outdoor or wet use, PETG is the stronger choice.
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Limits
Bambu's page doesn't list food-contact certification for PETG Translucent, so don't treat a printed vase as a drinking glass. Vases for real flowers can work, but layer lines are never perfectly watertight. Plan a liner if water is involved.
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Translucent PETG at IMPRESO
We print translucent PETG in-house at our Ridgewood, Queens studio. Tell us how the piece will be lit and where it will live, and we'll recommend the right material and wall setup. Every job is quoted individually.
Start a 3D project
Send us your file, a sketch or a photo of the light you want. We'll suggest a material and quote it.
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