ColorFabb copperFill Metal Filament 1.75mm (0.75 kg)

Be sure to have a separate nozzle for this or be using a slightly largish one, like .5mm and up, otherwise you're likely to get clogs in the middle of your print.I was using a .35 and I could not finish a larger print. I don't think this is a fault of the filament, as it's high quality and contains actual copper. it's really heavy! Just need a slightly larger nozzle for the particulates to flow through.

Horrible Quality Control. Had 4 print failures in an 8 hour period due to large warts on the filament. It would jam in the bowden tube and killed each of the prints (wasting like .25 kg of this stuff, so $25 down the drain there alone)When it worked (a couple of smaller test prints that were lucky enough not to be ruined) I was very happy with it, it polished nicely. I was going for a tarnished copper look to my design, and the test prints all turned a very nice blue/green patina when exposed to vinegar and ammonia, so you know its actually copper and that is had quite a bit of it.

I guess Ive been so used to getting a full spool this seemed disappointing considering it's $80.00 a roll. I do gotta say for the small amount that's on the roll its really heavy. The photo on Amazon needs to be updated so people know what they are really getting. That's why I'm giving a 3 rating, The photo below is what this product looks like out of the box.

Provided you're willing to put the work in. First of all, if you have a brass nozzle, which is the default for pretty much every printer out there, you're going to want to replace it with a harder nozzle like steel - all of these metal filled PLAs will eat your nozzle alive and you'll find it will get blobby pretty quickly. Second, be prepared for some trial and error when it comes to printing - I found that around 205f-210f, printing on to blue masking tape on a borosilicate plate works for me but you will need to dial it in for your printer. Once you've printed it, you'll probably be really disappointed because it will look like a muddy brown mess. While I have heard of people hand polishing it, I have found the best way is to put it in a rock tumbler for between 18-24hours along with some very small brass screws (between 1/2 and 1 cup depending on the size of the tumbler and the part). Once you've done that, some metal polish like brasso works really well and then add a patina if you want. Word of warning, this kind of polishing is tough on fine details so you have to judge where you want to stop the tumbling operation.

Wow, this stuff is fun. I haven’t got around to tumbling anything with it, though I understand brass screws make an excellent tumbling medium. It prints nicely, didn’t have any clog of extruding issues. Definitely a unique filament to print with.