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Anyone flatbed printing clear plexi?

Discussion in 'General Chit-Chat' started by soundhound, Nov 20, 2017.

  1. soundhound

    soundhound Member

    Nov 25, 2009
    Montpelier, Vermont
    I saw something recently... might have been a new plexiglas finish or formulation that would allow it to be flatbed printed without warping or causing the problems it has been causing.

    Wondering if anyone has tried or is using this tech, and if they are doing outsourcing.

    I have some clients that need a small amount of this...

    And I am interested in determining the outdoor durability of such a process.
  2. SignMeUpGraphics

    SignMeUpGraphics Moderator Staff Member

    Apr 11, 2012
    We've been printing in cast acrylic for 4+ years on our machine... never had a panel warp, so don't know what this "new" formulation is.
    We prefer to stick with using Optix DA as it has inbuilt adhesion promoters, otherwise Shinkolite is our next go-to media.
  3. boxerbay

    boxerbay Active Member

    Nov 25, 2010
    Darkside of the Moon
    cheap thin acrylic will bow with heat from the uv lamps. if were running thin acrylic with 2X passes and white - its really slow and gets a lot of lamp time causing it to warp up. We just turn one of the two lamps off when we run those types of jobs.
  4. ChrisN

    ChrisN Member

    Mar 6, 2014
    Denver, PA
    I haven't seen anything marketed as not warping - the only specialty print acrylic I know of is designed for better adhesion.

    I've had problems with the sheets being warped from the supplier, but rarely from the actual printing process. The advantage of a true flatbed is you can tape the edges of the sheet down to seal it to the bed.
  5. chinaski

    chinaski New Member

    Dec 16, 2015
    I print 4mm extruded acrylic regularly and I've never had problems with warping while printing. Sometimes it's warped from poor storage but since it's double-sided I flip the material over and that solves it. The vacuum works better when corners are bent "down", rather than "up". Make sure you're getting the most out of your vacuum by masking off the rest of the bed. If your vacuum is weak, you could always use a bit of thin double-sided tape.

    Is cast different from extruded in rigidity or sensitivity to heat? I've read otherwise, but I was told by my supplier that both have same sensitivity to scratching and are practically the same. Anyone test this?
  6. Nick Denny

    Nick Denny Member

    Feb 23, 2017
    Wichita, KS
    Same here. I print on clear acrylic pretty often on our Arizona flatbed and the only times I've had issues is when the material was warped to begin with. I've also used our HP FB500 hybrid with good results.
  7. SignMeUpGraphics

    SignMeUpGraphics Moderator Staff Member

    Apr 11, 2012
    No idea... our suppliers only sell us cast, not extruded so we have never tried it.

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