this post was submitted on 15 Oct 2024
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As someone who does R&D testing on plastics that are used in medical devices, I have some insight. Of course the type of plastic matters, but all plastics use carcinogenic chemicals during the manufacturing/extrusion process.
To make most plastic, a polymer resin is mixed with additives such as solvents, plasticizers, and stabilizers at high temperatures. Ideally, you want the additives to evaporate out during production so that you're left with just the newly formed plastic.
But some of these additives get trapped in tiny air pockets between polymer chains. When they're reheated, the polymer chains relax and release the volatile, carcinogenic additives into the air.
This is likely where the toxicity is coming from, not the polymer chain itself. So regardless of the type of plastic used, reheating the polymer during 3D printing will release some volatile additives.
Comments like this is why I come to Red....Lemmy.
Man, how much of a pain must it be to shave around those giant moles every day?
Just make a tape mask around the mole and apply hydrochloric acid with a cue tip. That mole is good as gone!
Then again his days included shaving & going to the pub (the same spot), so prob time wasn't that much of an issue.