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Question Prepping Signs For Digital Printing

Discussion in 'General Signmaking Topics' started by Marshallmax, Feb 11, 2020.

  1. Marshallmax

    Marshallmax Member

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    Oct 11, 2019
    Ohio
    Can’t seem to find any info regarding this. I was wondering the best process for cleaning aluminum sign blanks before printing. The signs are white on both sides, so of course I know they’re ready for print. However, i was wondering if I could wipe them down with 99% isopropyl alcohol before printing. Or is it safer to use soap and water?
     
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  2. Boudica

    Boudica I'm here for educational purposes.

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    We use the isopropyl alcohol for all substrates - except foam core and acrylic.
     
  3. Marshallmax

    Marshallmax Member

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    Oct 11, 2019
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    So you would say that it’s okay to use isopropyl alcohol on white sign blanks?
     
  4. Boudica

    Boudica I'm here for educational purposes.

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    Yep - cleans up the oils and won't leave a film. Plus, it cleans off the occasional scuff or mark that soap and water will not.
     
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  5. StarSign

    StarSign Active Member

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    Sep 20, 2011
    Southern Utah
    This is what we get when cleaning ACM with 99% this is after wiping and letting sit 20 min before printing.
     

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  6. WYLDGFI

    WYLDGFI Merchant Member

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    Wipe with Iso 91% and then dry and buff out. Looks great when you print.....
    Personally, I spray directly ONTO the aluminum or coro or anything else Im cleaning that way. Its amazing how you see fingerprints or hand swipes on non masked substrates. Do not let the Iso sit on the substrate.
     
  7. Gino

    Gino Premium Subscriber

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    Yeah, what he said. Wipe it around cleaning it , but keep wiping til it's dry. Don't let it air dry or you'll get the streaks and hazing Star mentioned.
     
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