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  1. #1
    Premium Member
    Join Date
    Dec 2004
    Location
    Kingston Ontario Canada
    Posts
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    3

    Default Moire on film . . .

    OK, this is a new one to me. I'm getting some really wicked Moire appearing on my film . . . Here are the specs:

    Epson 7600 Dye Ink
    2880 Super Photo resolution

    50 LPI
    22.5 degree angle

    Accufast Film

    About 3 months ago I upgraded from an Epson 3000 with a RIP, to the 7600 without a RIP (Bitmap technique) but other then that, nothing has changed in my setup.

    The Moire is incredibly noticeable because the art is a pretty smooth radial gradient.

    Since it's on the film, I know it's not halftone vs thread count moire, or moire generated from the threads of the shirt weave.

    Anyone got any ideas? Is there something I should click or unclick in the printer prompts?

  2. #2
    RichieGoodtimes's Avatar

    Join Date
    Mar 2002
    Location
    San Frangeles, Califas
    Posts
    27,045
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    5093

    Default

    I have a very long explanation for this but I must feed my daughter.

    Try 52° or 82° and see what happens.

  3. #3
    Premium Member
    Join Date
    Dec 2004
    Location
    Kingston Ontario Canada
    Posts
    969
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    Default

    I re output at 45LPI, at 52.5 degrees w/ a round halftone dot.

    Seems that most of the moire is gone . . . there's a bit on one of the films, but nothing like the last time . . .

    My old 3000 used to shit the bed at 65lpi . . all the halftones looked like SS lightning bolts . .

  4. #4
    paul204's Avatar

    Join Date
    Apr 2009
    Location
    Montréal
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    243
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    0

    Default

    If you think it's a problem with halftone interpretation, you can download ghostrip and install a dummy hp postscript printer. Print to file with the dummy printer, open the file in ghostrip and print to your 7600. That's what I do. I don't know that it will help the moire, though. I haven't had any problems on a 7600 printing 55lpi/25 degrees.

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