PrintMath

{a} vs {b}

PropertyPLA-CF (carbon fibre)PETG-CF (carbon fibre)
Nozzle temperature200–230 °C240–265 °C
Bed temperature50–60 °C70–85 °C
EnclosureNot requiredNot required
Density1.3 g/cm³1.35 g/cm³
Strength4/55/5
Heat resistance~60 °C~80 °C
UV resistance2/54/5
Flexibility1/52/5
Print difficulty2/53/5
Typical price~$30/kg~$40/kg

Quick verdict

{name} in short

PLA filled with short carbon fibres. Stiffer and more dimensionally stable, with a matte finish. Needs a hardened nozzle because the fibres are abrasive.

{name} in short

Carbon-fibre PETG: stiff, strong, and still reasonably tough. A good functional material if you have a hardened nozzle.

Which should you choose?