3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: !functionalprint@kbin.social or !functionalprint@fedia.io
There are CAD communities available at: !cad@lemmy.world or !freecad@lemmy.ml
Rules
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No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
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Be respectful, especially when disagreeing. Everyone should feel welcome here.
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No porn (NSFW prints are acceptable but must be marked NSFW)
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No Ads / Spamming / Guerrilla Marketing
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Do not create links to reddit
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If you see an issue please flag it
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No guns
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No injury gore posts
If you need an easy way to host pictures, https://catbox.moe/ may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is 
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This was the info I was interested in.
Finely ground (espresso) coffee grounds were dried in the sun and then sifted. Then mixed with binders (xanthan gum and carboxymethyl cellulose powders) and water. These are printed in a modified consumer grade fdm 3d printer using a syringe instead of the hot end. The resulting material is claimed to be as strong as unreinforced concrete, but is biodegradable.
I’d be curious what their measure of concrete is. The plain stuff has 3000psi compressive strength and a usable modulus of rupture of around 250psi. And if it survives re-wetting / over-drying and aging.
PLA is (very) roughly 20x that.
Neat!