this post was submitted on 21 Sep 2023
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67
Don’t throw out those used coffee grounds—use them for 3D printing instead (arstechnica.com)
submitted 2 years ago by [email protected] to c/[email protected]
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[–] [email protected] 43 points 2 years ago* (last edited 2 years ago) (2 children)

The dried grounds were sifted with a standard kitchen strainer to remove large clumps and then mixed with xanthan gum and carboxymethyl cellulose powders, which serve a similar purpose to binders, stabilizers, and thickeners.

Yeah, so don't throw out those used coffee grounds, just mix them with the carboxymethyl cellulose powder you probably have in the cupboard, and the leftover xantham gum you have laying around.

Then make a custom syringe feeder for your 3d printer.

[–] [email protected] 15 points 2 years ago (2 children)

Both of those ingredients are cheap, and Xantham Gum in particular is used in gluten free baking recipes a lot.

[–] Swim 7 points 2 years ago (2 children)

its a thickener in sauces too, very handy and all natural despite the scary name

[–] [email protected] 4 points 2 years ago

it can also be used to make frappucinnos, since you're already making coffee.

[–] [email protected] 4 points 2 years ago (1 children)

It being natural doesn't mean anything, though. Plenty of naturally dangerous things out there...

[–] Swim 5 points 2 years ago* (last edited 2 years ago) (1 children)

this is not one of them. Xanthan gum is a food additive created by a sugar that’s fermented by a bacteria. It’s a soluble fiber and commonly used to thicken or stabilize foods.

[–] [email protected] 3 points 2 years ago (1 children)

I don't doubt it, I just have a problem with the reasoning that something is "natural" and therefore good. It's a common misconception that charlatans use to prey on people.

[–] Swim 1 points 2 years ago

the inverse is true as well so its kinda moot

[–] [email protected] -1 points 2 years ago

Too bad only about 1% of populace has celiac spruce.

[–] [email protected] 4 points 2 years ago

And your things still look like they were printed with solidified shit.