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dgroshev 11 hours ago

I'd encourage people doing engineering/functional parts to also try ASA and PC(-CF). Both are pretty easy to print on enclosed printer like Prusa Core One, and they offer unique qualities that are impossible to achieve with PLA or PETG.

Prusament PC Blend is insanely strong and stiff, I saw a 3mm PC bracket bending a high quality metal wood screw into an S-shape without breaking. PC-CF is much easier to print, looks great, and is stiffer still, even if a bit less strong. ASA looks great and is tougher than PC. Both creep less than PLA and PETG. Both shrug off 100C under load.

404mm 2 hours ago | parent [-]

ASA and ABS really need a good filtration. Like actual filtration, not what the enclosure has. I personally just run a duct to my window and vent outside.

dgroshev an hour ago | parent [-]

That's largely a myth.

This review [1] cites the absolute highest amount of emitted styrene in the studies they are reviewing to be 113 μg/min. Using [2] for simplicity with styrene's molar mass (104.15 g/mol), we get to a printer creating at most 0.024 ppm of styrene per minute per m3 of unchanged air. For comparison, the "work exposure limit (WEL) for styrene is currently 100 parts per million (ppm) averaged over an 8-hour day" [4].

In other words, as long as you have some air exchange in the room, you'd be orders of magnitude away from the safe work exposure limit on styrene.

It also makes sense, considering that it's a microscopic amount of molten plastic, whereas injection moulding factories work with vats of the stuff.

[1]: https://www.sciencedirect.com/science/article/pii/S135223102...

[2]: https://teesing.com/en/tools/ppm-mg3-converter

[3]: https://en.wikipedia.org/wiki/Styrene

[4]: https://www.hse.gov.uk/plastics/faqs.htm