Filament
PETG-CF
PETG reinforced with carbon fibre: stiffer and more dimensionally stable than PETG, with a matte black surface and far less stringing. Prusa publishes 265 ± 10 °C nozzle and 90 ± 10 °C bed for its PETG Carbon Fiber; Bambu Lab publishes 240–270 °C, a 60–80 °C bed and drying at 65 °C for 8 hours. Both require a hardened nozzle.
Safety and handling
Normal filament ventilation and the same abrasion precautions as any fibre-filled composite: hardened steel nozzle, mask while sanding, wet sanding where possible. The bed runs between 80 and 100 °C, hot enough to burn. Prusa describes its PETG Carbon Fiber as 'almost odourless when printing', which does not remove the need to ventilate the room.
Technical profile
- Nozzle temperature
- 240–275 °C
- Bed temperature
- 60–100 °C
- Heated bed
- Yes
- Enclosure
- Not needed
- Density
- —
- Absorbs moisture
- Yes
- Drying
- 65 °C · 8 h
- Difficulty
- Advanced
Typical price per kilo in Mexico
Price not verified
Strengths
- Much stiffer than PETG: Bambu reports a 2910 MPa bending modulus versus 1670 MPa
- Better dimensional stability while printing
- Better heat resistance than PETG (74 °C deflection per Bambu)
- Almost no stringing, unlike unfilled PETG
- Very clean matte black surface
Weaknesses
- Lower toughness than plain PETG: it gains stiffness and loses the ability to bend
- Abrasive: it requires a hardened steel nozzle
- Prusa warns it is not suitable for small parts
- Clearly more expensive than PETG
- Hygroscopic: it needs drying before use
Common uses
- Rigid medium and large brackets and mounts
- Outdoor parts that also need stiffness
- Light workshop tooling
- Professional housings with a matte finish
Related problems
Documented printing defects that show up with this material.
Work out your cost
How much material a part uses and what it costs to print, with the formula in plain sight.
- Quiz: which 3D printer suits me?
- Filament calculator: grams, metres and pesos
- Resin calculator: millilitres, grams and cost
- 3D print cost calculator in Mexican pesos
- 3D printer power consumption calculator
- 3D printing material comparator
- Nozzle and layer height reference
- Diagnostic tree: find your failure by symptom
- STL vs 3MF: which to use and how to convert
- 3D printer comparator
- 3D printing glossary search
Sources
- [1]Prusament PETG Carbon FiberPrusa Polymers · Manufacturer · accessed July 27, 2026
- [2]Bambu Filament Guide (PETG-CF)Bambu Lab · Manufacturer · accessed July 27, 2026