Proto-pasta CDP11705 Electrically Conductive Carbon Spool , PLA Composite 1. 75 mm, 500 g , Black

Very finicky to print with. High impedance is not great for my purpose.

Worked just like pla+: tough, not stringy, with a matte finish. Much easier to work with than other "conductive pla" brands. Good value for the money, print quality is rarely an issue with the prusa mk4s. This holds true with this filament. It was a little sticky to the pei bed, but nothing a plastic scraper couldn't remove after it cooled down.

Ordered 3 spools and it was unusually brittle. Kept breaking off during feeding into the printer. Have tried other brands of conductive PLA with no issue. Not reccomended.

I'd give the Conductive PLA 4.5 stars if I could. It's a bit pricey, but I'm only using it for small limited prints. It worked perfectly for an adaptive stylus I printed: http://kfkdesigns.com/stylus/ I followed the manufacturer's recommendations & cranked up the print temp (basically treated it like ABS) & it printed fine on my Simple Metal. I also used a heated bed, just to prevent unwanted warping. I've noticed two downsides to the filament: (1) reduced layer adhesion (ever at the higher print temps) which results in parts a little more brittle than standard PLA, (2) when switching to a different filament, black residue remains in the hotend and discolors the new filament for about 30 minutes of print time, even after using a cleaning filament. However, I can easily overlook/work around these issues for the conductive benefit.

I had really big hopes for this filament. But it doesn’t pass a simple continuity test. Super disappointed. Otherwise, its a great PLA filament… for 4x the price!