Keeping paint from sticking to PLA

New Home Forum Random or Off Topic Keeping paint from sticking to PLA

This topic contains 9 replies, has 4 voices, and was last updated by  Bill 1 month, 2 weeks ago.

Viewing 10 posts - 1 through 10 (of 10 total)
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  • #110880

    David Walling
    Participant

    This is kinda the opposite of what all the tutorials on the web focus on…

    I recently 3d printed a paint pallet. I plan on using it with acrylic paints to teach my son how to build plastic models.

    I don’t want the acrylic to stick to the pallet, so I’m trying to figure out what to use. I’m thinking I can just polish the plastic using a car wax/polish.

    Any other ideas from my friends on the forum?

    • This topic was modified 1 month, 3 weeks ago by  David Walling.
    #110939

    Barry
    Participant

    Print a pallet mold, then cast in silicone.  Actually, wonder if acrylic paint sticks to flex seal?

    #110941

    David Walling
    Participant

    Oh! That’s a good idea. I have some of that in a can somewhere. I can test it on something.

    #111030

    Barry
    Participant

    Another thing to try if that doesn’t work. “Paint” the trays with a thin layer of clear silicone caulk.  Hell, we could be overthinking this and a few layers of polyurethane would work.  🤷‍♂️

    #111044

    David Walling
    Participant

    It looks like I could spray it with a clear acrylic varnish. Once it’s dry, it’s supposed to be super hard and impervious to other liquids.

    I have a couple of things to try now. Probably won’t be until this weekend before I can get to any of them.

    I’ve already printed a paint tray that I designed:

    https://www.thingiverse.com/thing:3829566

    #111401

    GTKplusplus
    Participant

    Acrylic pretty much always sticks to acrylic. Maybe not particularly well, but it does. So just a varnish wouldn’t do. However, if you get it extremely smooth you wouldn’t even need it. But we are talking almost mirror polished (if it were metal).

    I think the silicone idea is the easiest and quickest. Either casting or just covering the pallet with it.

    #111462

    David Walling
    Participant

    The casting in silicone keeps popping up. I’ve never done this. Does someone have a good tutorial on how to turn my 3d print into silicone?

    #111465

    David Walling
    Participant

    Oh. I guess I just need to recreate my paint pallet as a negative. Then pour the silicone over it. Instead of the silicone being a mold, it will end up being my finished part.

    1 user thanked author for this post.
    #111899

    David Walling
    Participant

    Hopefully I don’t disappoint anyone… My wife reminded me that paint pallets are 5 for $1 at the dollar store…

    Maybe I’ll get around to testing something in the future.

    1 user thanked author for this post.
    #112175

    Bill
    Participant

    Tell her that the dollar store just isn’t as much FUN! 🙂

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