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Indoor lettuce growing in 3D printed pots (sh.itjust.works)
submitted 1 year ago by to c/3dprinting@lemmy.world
33 comments fedilink hide all child comments
 

I love it when my hobbies collide.

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[–] 46 points 1 year ago (10 children)

Is this PLA or ABS? Not to be 'that guy' ^TM^ but I would be worried about microplastics and leaching if you are eating that lettuce!

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  • [–] [S] 8 points 1 year ago (7 children)

    It's PLA. I honestly hadn't considered the microplastics when using this material as a growing container. Though I do know not to use it to make cups and bowls and stuff that you eat out of.

    I think my printer can print ABS, although I've never tried. Would that material be safer to grow in?

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  • [–] 16 points 1 year ago (6 children)

    Certified food-grade PETG + food safe resin seal is the best from what I have read (I researched a bunch as I am building a greenhouse)

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  • [–] [S] 8 points 1 year ago (5 children)

    Thank you for the knowledge! It looks like foodgrade petg is 3 times the price and I don't plan on changing nozzles and stuff to keep everything kosher anyway. So I reckon I'll use regular petg and hit it with Shellac for the redux. Unless you have a food safe resin seal to recommend based off your research?

    Thanks again!

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  • [–] 5 points 1 year ago (1 child)

    Hobby woodworker here. Shellac is great for an initial seal, but isn't waterproof. I suggest using a two part epoxy instead. You don't need a very thick coat, so you could even use a crack filler and/or self leveling variety.

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  • [–] 5 points 1 year ago (2 children)

    No problem - yeah that will probably be just fine, at non-commercial scale the seal will probably never get worn off and if you did ever notice spotting you can just reseal.

    Unless you have a food safe resin seal to recommend based off your research?

    Nope not yet! Still in the structural phase here so when I get to printing I will share for sure.

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