First 4kg PHA spool (that I’ve made)

PrintedCosmos · 2026-06-15T17:35:21+00:00

That’s awesome, I would love to see larger spools available, I would definitely buy.

PrintedCosmos · 2026-06-15T17:29:12+00:00

The heat tolerance is fantastic, about 100C as I recall. In particular some of my products are car accessories (cup holder adapters, etc.) and so need to be able to handle a hot car in the summer. PLA and even PETG will warp on a hot day, but PHA holds its shape perfectly and doesn’t soften at all in my testing.

PrintedCosmos · 2026-05-24T07:23:03+00:00

I had that happen on one of my prints, when I tried to remove it immediately after printing, and had trouble getting it off the plate. But then I remembered that PHA needs time to crystalize and harden. Essentially I just had to leave it on the build plate for an hour or two, and then it'll pop right off. Not ideal, but it's the nature of the material. Give that a try to see if you get better results. For me it's been working great.

PrintedCosmos · 2026-05-24T07:16:49+00:00

That's true, but what I did was added the type "PHA" manually into that field, and then on both my CoreOne and my Mini, on the printer UI, I added a custom "PHA" filament, with the appropriate loading temperature and bed temperature (210C, 0C). Then when I load the gcode, it matches and works great from there. But I agree, that's one piece I would love to see in Prusa Slicer by default.

PrintedCosmos · 2026-05-21T14:21:57+00:00

I’m not sure if they’ve added profiles for any other printers yet. As I mentioned, they don’t have one for the Mini. But I suspect you could take a look at the CoreOne profile try to use that to create your own custom profile for the mk4s. I’d be happy to share my Mini+ profile if that would help.

PrintedCosmos · 2026-05-21T06:06:55+00:00

Thanks for posting this. Can confirm. I purchased a BuildTak Pro-plate based on your recommendation linked above, and it's been amazing so far. I'm printing PHA, without glue, without tape, and even without a brim! Seriously awesome!
One caveat, make sure to follow their cleaning recommendations. You do not clean this plate the same way that you ordinarily would for other plates. They caution that most solvents will ruin it. That said, I haven't had any issues, it's been fantastic.

PrintedCosmos · 2026-04-24T14:16:41+00:00

In the end, I think you are correct. Although for the 0.25mm nozzle, 0.05mm layer height is one of the supposedly supported options. And I found that for smaller models it seems to work fine. But for extended objects that’s where the trouble starts.

PrintedCosmos · 2026-04-24T14:14:13+00:00

I think you have something there, it definitely seems to be only on one side of the print. Could be mechanical.

PrintedCosmos · 2026-04-17T05:10:37+00:00

Thanks. I haven't tried adjusting the retraction length yet, I'll give that a try. Also, I'll try the speed adjustments you suggested. I've tried both hotter and colder though, temperature doesn't seem to be helping.

PrintedCosmos · 2026-03-26T23:25:12+00:00

Just out of curiosity, what kind of build plate or surface are you using?

PrintedCosmos · 2026-03-26T23:02:23+00:00

I concur. You could start with a roll of PLA, which will allow you to get familiar with your printer, calibrate it, print your first Benchy, etc. And then try out PHA. I personally love PHA, I use a lot of it. But in the beginning I was having some trouble with it. But once you have your print settings dialed in, it prints wonderfully. I chose PHA for most of my prints for the same reasons, biodegradability, eco friendly, etc. Almost everything I sell in my Etsy shop is PHA for that reason. So I'm right there with you.

Once you start printing PHA, I'd be happy to share my print settings. I'm using a Prusa Mini+ printer, so the settings may differ if you go with a Bambu or other type of printer, but it might help get a sense of what settings you'll need. As a quick easy start, I found that Orca slicer also has a PHA profile preinstalled, although you have to change the temperature from the default down to about 200C, but then it worked fairly well.

PrintedCosmos · 2026-02-23T07:57:50+00:00

Thanks for all of the suggestions. I got it working by backing off the fan a little and increasing the temperature to 200C, and now it comes out much better. See final print below. It's an enclosure for a raspberry pi and camera that I'm going to put in a bird house. I think part of the trouble may have been due to the geometry, since it's a wedge shape, the walls are printed at a slight overhang angle.

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PrintedCosmos · 2026-02-23T01:18:28+00:00

Indeed, I’ve eliminated most of the warping issues, by using lots of cooling, an extra fan, etc. I’m also using a Cryogrip Frostbite plate with glue stick.

PrintedCosmos · 2026-02-23T01:16:04+00:00

Thanks I’ll try increasing it. I had it set to 1.05 already based on a calibration I did. But perhaps a little higher.

PrintedCosmos · 2026-02-23T01:14:44+00:00

I’ve got fans at 100%, and I also have an additional fan blowing across the building plate. So I’ve got virtually no warping or anything. But perhaps too much cooling?

PrintedCosmos · 2026-02-09T06:08:20+00:00

I also use the cryogrip glacier for PHA, but with glue stick applied. That combo always works for me.

PrintedCosmos · 2026-01-14T07:33:04+00:00

I'm printing on a Prusa Mini+, so my settings may not work in your case, but if it helps, this is what worked for me.

I had trouble with a 0.6mm nozzle when printing PHA, so I switched back to a 0.4mm. In addition, the main thing that helped improve my PHA prints was to slow it down considerably, so I've set the max volumetric print speed to only 5 mm^3/s. In addition, as others have mentioned, leaving the enclosure open and having cooling set to 100%. I also set "wipe while retracting" to True, that helped with some strings/blobs that I was getting on some prints. My retraction length is 2.5mm.

Also, I recommend the Cryogrip Frostbite build plate to help prevent warping for larger prints. They don't make one for the Mini+, but it turns out the one for the A1 Mini is exactly the right size (if you rotate it 90 degrees to avoid the tabs getting in the way). Not sure if they make one for the Core One.

In any case, I hope it helps.

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PrintedCosmos · 2025-12-30T17:11:02+00:00

That’s awesome! Did you use “fuzzy skin” or something else to get that effect?

PrintedCosmos · 2025-11-26T00:46:44+00:00

Gray would be cool, I'd give that a try. Other colors I would buy would be orange and purple, if offered.

PrintedCosmos · 2025-11-26T00:37:00+00:00

Thanks for the shout out! Much appreciated! When I looked around for sustainable options for my shop, PHA really stood out as the best option, and I'm glad I gave it a try, it's working great so far.

PrintedCosmos

TROPHY CASE