• MindTraveller@lemmy.ca
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    2 months ago

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

    • ElongatedMuskrat@lemm.ee
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      2 months 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.

      • MadBigote@lemmy.world
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        2 months 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.dev
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          2 months 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.world
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          2 months 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.dev
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            2 months 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.ca
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        2 months 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.world
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          2 months 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.world
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      2 months ago

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

  • someguy3@lemmy.world
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    2 months ago

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