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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  • [+] 9 points 1 year ago (3 children)
  • [–] 4 points 1 year ago (1 child)

    Depends on the filament type. Stuff like PLA and PETG have issues like that. ABS and ASA generally don't. Outdoor stuff should generally be done in ABS or ASA (though I prefer to avoid them otherwise).

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  • [–] 1 point 1 year ago

    Depends on the usecase though. If it's something you could reasonably lose in nature (like markers you put in the ground, small signs and such) I'd rather use pure PHA. It will degrade of course, but that's a good thing after all. I'd rather reprint some small utilities occasionally than damaging the very nature I'm trying to foster after all.

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

    Sure... a typical setup strictly for growing "lettuce". Nothing else to see here...!

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  • [–] 4 points 1 year ago

    Looking forward to when we can print the lettuce directly.

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  • [–] 3 points 1 year ago

    Now THAT's a good solution, so much better than trying to do it in one of those silly pod setups that don't give enough room for growth.

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  • [–] 3 points 1 year ago

    what a beautiful image!

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

    I love all the comments about people being worried about microplastics, as if it's not already impossible to avoid them. Don't get me wrong, adding more and going out of your way to eat plastic ain't great, but this is such a small scale fun little hobby!

    You must have a massive printer to make those huge tubs though and that's what I'm intrigued by

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  • [–] [S] 4 points 1 year ago (4 children)

    It's a decent size for sure but I am constantly finding bigger stuff that I want to print that doesn't fit lol.

    Elegoo Neptune 4 Pro by the way. It has been a great first printer but my next one will have a truly monster build plate.

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  • [–] 3 points 1 year ago (3 children)

    What's even crazier to me is those don't even look like large walls! I don't suppose you could transport them like that?

    I used to make (considerably smaller) hanging plant pots and boy were they thick. I really didn't want to have dirty rained down on me while watching TV haha. How well have yours held up?

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  • [–] [S] 4 points 1 year ago (2 children)

    The walls aren't super thick but the guy who designed this thing did a great job. I pick them up all the time, I actually take them to the sink to water them instead of taking the water to them because it's less messy.

    You can find the design here: https://www.printables.com/model/762433-expanded-a-wider-planter

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

    looks nice but that is a great way to get microplastic infused lettuce

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  • [–] 2 points 1 year ago

    I've used milk jugs as plant pots before. It's food safe material and you can easily design a build around it. Better not have anything 3D printed come into contact with food.

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