• BakedCatboy@lemmy.ml
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    2 months ago

    That was my first thought too but apparently it’s ceramic 3D printing (the only ceramic printers I’ve seen are like $MM). I wonder how that can possibly scale to be as cheap as what mossy earth is doing by epoxying sand onto a metal frame and metal twist tying coral fragments onto it.

    • plinky [he/him]@hexbear.net
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      2 months ago

      there are burn filaments for ceramic (and metal) i believe, so they are porous, but pure ceramic after burnout (they have like 30% plastic/70% ceramic, plastic is burnt out at like 700c or something and leaves ceramic/metal part*), and can be printed with cheap 3d printers

      *with lots of holes in it, so not structurally sound, but here it’s not important and probably even desirable.

      • BakedCatboy@lemmy.ml
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        2 months ago

        Yep that’s correct, with ceramic you don’t end up with any plastic in the final product. I’m more familiar with SLA ceramic printers which use a resin, and FDM metal printing that uses a kind of wax, also burned out in a tube furnace.

          • BakedCatboy@lemmy.ml
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            2 months ago

            Gotcha, yeah unfortunately FDM ceramic still has crazy high spool costs so I don’t think it really puts it into the same ballpark as using simpler materials. We’re talking like $500 a spool, just one printed piece like you see in the picture looks like it would take an entire spool or more and could be the better part of $1K. I’m comparing to Mossy Earth’s strategy of binding together metal rods and coating with sand, which after labor lands at $26 per structure.