Translucent and Clear Filament: PLA and PETG Compared
Why FDM clear is tricky
Light passing through a printed part has to cross every layer line. Each line is an interface where light bends, scatters and reflects. The result is a frosted look even with a perfectly clear material. You can make the part more transparent by reducing the number of interfaces or by making them smaller.
Material picks for clarity
| Material | Clarity | Notes |
|---|---|---|
| PETG | Best for FDM clear | Naturally clear base, melts cleanly |
| Clear PLA | Cloudy clear | Easier to print than PETG |
| Translucent PLA | Tinted, softer light | Wide colour range |
| Translucent PETG | Tinted, sharp clarity | Best for tinted clear |
Settings for maximum clarity
- Bigger nozzle: 0.6 to 0.8 mm cuts layer count significantly
- Thicker layers: 0.28 to 0.4 mm pairs with the bigger nozzle
- Slow print speed: 25 to 40 mm/s gives the layers time to fuse
- Hotter temps: aim 10 to 15 C above the supplier's mid range
- Few perimeters, no infill: print solid walls with concentric or single-line infill
- Or accept the look: a frosted finish often looks better than a partially clear one
Post-processing for true clear
If you actually need a glass-like finish, the reliable path is print, sand from 400 to 2000 grit, then apply a gloss clear coat (Pledge floor polish, polyurethane, or acrylic clear). This fills the layer scatter and reads as genuinely transparent.
Best uses
- Lampshades and light diffusers
- Lithophanes
- Decorative jars and containers
- Sci-fi props and prosthetics
- Plant terrariums and aquarium accessories (PETG only)
Browse the range
Translucent PLA, Translucent PETG, Clear, Translucent Gradients.