Bambu Lab PLA-CF Filament 1.75mm 1kg

Carbon fibre in the mix gives this filament a stiffness and bending strength normal PLA can't touch, with a matte, almost line-free finish that looks closer to an injection-moulded part than something off a hobby printer. Good for brackets, jigs, tools, and anything else that needs to hold its shape under load.

It costs more than Basic and it's tougher on your hardware, but for load-bearing parts it's a straightforward upgrade — same easy printing PLA is known for, with genuinely better mechanicals behind it.

At a glance

Spool or Refill?

Spool — Comes on a reusable Bambu spool. Pick this for your first roll of a colour.

Refill — Filament only, $2 cheaper, needs an empty reusable spool to mount on. Less plastic in the bin, less money out of your pocket.

Worth knowing

Carbon fibre is abrasive. It'll wear through a standard stainless steel nozzle over time, so a hardened steel nozzle is strongly recommended if you're printing much of this — Bambu's own spec sheet rules out the 0.2mm stainless nozzle for this filament entirely, and only lists 0.4mm and up.

Storage

Bambu specifies under 20% RH, sealed with desiccant. A sealed box with fresh desiccant does the job, or a filament dryer if you have one. Drop a cheap hygrometer in the box so you're not guessing.

As filament takes on moisture you'll hear popping or hissing at the nozzle, then see stringing and rough surfaces, and eventually the strand goes brittle enough to snap in the tube. That's almost always moisture, not technique. Dry it at 55°C for 8 hours and it usually comes back.