this post was submitted on 19 Jan 2025
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Extensive skin contact with PLA and PETG seems okay (lemmy.sdf.org)
submitted 2 days ago by ExtremeDullard@lemmy.sdf.org to c/3dprinting@lemmy.world
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As you may know, I now wear 3D-printed glasses.

I've been wearing glasses for decades, since age 3, and because I'm lazy, I never take off my glasses even when I sleep, I'm not sure how, but even when I'm asleep, I never turn into a position that would damage my glasses. Decades of habit I guess...

Anyhow, the point is, apart from when I shower and when I go to the swimming pool, those 3D-printed glasses are sitting squarely on my face all day, every day. So probably close to 23.5 hours a day.

And I'm happy to report, PLA and PETG seem to have zero effects on my skin. No rash, no redness, no itching, zero discomfort. I've worn each material for at least 2 months straight and they seem perfectly fine.

I don't see any degradation of either material either, even after being exposed to acidity and oil from my skin for hours on end. I didn't expect PETG to react to anything, since it's more or less the same stuff soda bottles are made of, but I thought maybe PLA would degrade. But it doesn't. Perhaps it degrades slower than I anticipated. I'll report back in a year 🙂

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[–] jagged_circle@feddit.nl 5 points 2 days ago (1 children)

How do your lenses not get scratched? I usually have to replace the lenses before the frame

[–] ExtremeDullard@lemmy.sdf.org 1 points 2 days ago (1 children)

Maybe this would help 🙂

[–] jagged_circle@feddit.nl 2 points 2 days ago* (last edited 2 days ago) (1 children)

I already only use a microfiber cloth (provided with a case by zenni at purchase time), but I normally use water. Why do I need to buy a special fluid?

[–] ExtremeDullard@lemmy.sdf.org 5 points 2 days ago* (last edited 2 days ago) (1 children)

The special fluid isn't strictly needed. It's just water with a few mildly useful ingredients in solution - most importantly a solvent that's safe for plastic glasses. But it's mostly distilled water, so it won't leave stains like hard water would.

If water is good enough for you, then it's enough I guess. Although cleaning the lenses with soap would be preferable to straight water.

The most important thing to avoid scratching your lenses is to resist the temptation to clean them with anything other than a spotlessly clean microfiber cloth and cleaning fluid - or soap and water. Like blowing on them and cleaning them with your shirt: that's guaranteed to scratch them.

And if you have only one microfiber cloth, get more. They get dirty and start scratching lenses too very quickly if you don't clean them regularly. Me, for the price, I just throw them away and get new ones.

[–] jagged_circle@feddit.nl 3 points 2 days ago

Yeah I can't throw cloths away, so probably I should launder my microfiber cloth more frequently