• MindTraveller@lemmy.caEnglish
    4710·
    1 year ago

    Do the prints slowly release microplastics into the water that kill the urchins?

    • ElongatedMuskrat@lemm.eeEnglish
      631·
      1 year ago

      If they used PLA(made of cornstarch) which is common for fdm 3d printing then theres no threat of microplastics from what ive read. it is biodegradable, but very slowly.

      • Infynis@midwest.socialEnglish
        362·
        1 year ago

        Makes sense. People that are serious about fish tanks don’t mess around

      • MadBigote@lemmy.worldEnglish
        233·
        1 year ago

        I doubt it’s 100% cornsarch. I work in the plastics industry and there’s all sorts of travesties going on. We also have a line of cornstarch-made products, but they’re all scams when it comes to “recycling” and “being biodegradable”.

        There’s definitely plastic in it.

        • brian@programming.devEnglish
          14·
          1 year ago

          Polylactic acid is made via condensation of lactic acid, which can be made entirely from corn. It’s still plastic, but just made from renewable sources. It’s pretty recyclable and can be industrially composted, but in normal conditions it lasts as long as any other plastic.

        • Aux@lemmy.worldBannedEnglish
          23·
          1 year ago

          I don’t know what you are doing in the plastics industry, but it seems that you don’t understand what words “biodegradable” and “plastic” mean.

          • Hotdog Salesman@programming.devEnglish
            41·
            1 year ago

            PLA is biodegradable. Just only under industrial conposter conditions so yeah still a problem.

            But a plastic is just a chain of polymers, it makes it difficult but not impossible to biodegradability depending on chemical and structure. Almost all plastics don’t but some do

      • fleet@lemmy.caEnglish
        61·
        1 year ago

        From what I’ve read PLA is only biodegradable under very specific conditions. I looked into it and you have to send it to a recycling center designed for PLA and its expensive to do so. I would assume microplastics would still be present too. Even though it can be sourced from plant matter its still plastic.

        • Aux@lemmy.worldBannedEnglish
          31·
          1 year ago

          PLA is digestible, it doesn’t pose a microplastic threat. If it gets into you, it’ll become a part of your poop.

    • Maalus@lemmy.worldEnglish
      213·
      1 year ago

      About the same level of concern that feeding your dog dry food is. If not even smaller.

        • Swedneck@discuss.tchncs.deEnglish
          51·
          1 year ago

          ah yes the horrible agenda of “hey can we maybe not add even more microplastics to our environment?”

    • Zetta@mander.xyzEnglish
      1·
      1 year ago

      Probably a lot less than what’s in the ocean!

  • someguy3@lemmy.worldEnglish
    32·
    1 year ago

    There’s something terrifying about a sea urchin wearing a hat slowly approaching you.