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Thread: Purple line through my scanned negative

  1. #1

    Join Date
    Nov 2011
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    16

    Purple line through my scanned negative

    I'm using a Microtek i900 to scan black and white negatives. I just noticed a purple line going through the entire scan.

    When I first started researching the problem I was thinking it was a calibration issue but after further reading that may not be the case since I'm scanning black and white.

    Has anyone had this issue with this scanner? If so, was there a remedy?

  2. #2
    Joanna Carter's Avatar
    Join Date
    Oct 2006
    Location
    Plestin-les-Grèves, France
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    992

    Re: Purple line through my scanned negative

    If it were an Epson scanner, I would immediately say, "check the prescan calibration area of the glass for dirt". Does the Microtek have anything similar?
    Joanna Carter
    Grandes Images

    UKLFPG

  3. #3

    Join Date
    May 2010
    Location
    NW England
    Posts
    105

    Re: Purple line through my scanned negative

    I get it with my Canon 9950f, I cailbrate before each scan.

  4. #4

    Join Date
    Nov 2011
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    16

    Re: Purple line through my scanned negative

    There is no glass on the Microtek.

  5. #5

    Re: Purple line through my scanned negative

    On my M1, I was getting the same magenta (or sometimes purple) stripes that would go the length of the scans. I contacted Microtek and they said my scanner was "defective" and replaced it under warranty.

    My scanner has again started showing these magenta/purple lines and I don't know if I want to pay to have it "fixed" (since it's out of warranty). Seems to be a recurring issue with some of their scanners. Or at least my scanners.

    It has something to do with dust for sure but no matter what I try to clean, nothing seems to help. Dust on the sensor or something. Wish I had a trick to share but I'm afraid I don't!

  6. #6

    Join Date
    Sep 2003
    Location
    Massachusetts USA
    Posts
    8,340

    Re: Purple line through my scanned negative

    I started getting lines whenever I would make 16-bit scans on my Microtek 2500f.

    I got an Epson.

  7. #7

    Join Date
    Oct 2010
    Posts
    3,326

    Re: Purple line through my scanned negative

    I have this issue with my i900 all the time, unfortunately. Since the calibration area for the glassless holders has nothing to hold dirt or dust that can affect calibration, I took the top plate off the scanner and noticed a good amount of "debris" accumulating in the little reflecting tray beneath the light source transport. A good upside-down shake and some canned air solved the problem. I can only assume that dust and particulate that accumulates inside this little white, curved tray does affect calibration.

    One time I had the most horrendous striping in my scans--a 1/2 inch band across the whole image. When I dug around inside I saw that a large moth had died in that little tray under the light source. Once I cleaned it out the scanner was fine.

    All in all I like the Microtek, but it requires internal cleaning more than I would have thought.

  8. #8

    Join Date
    Nov 2011
    Posts
    16

    Re: Purple line through my scanned negative

    I opened the top and sprayed some air. Knock on wood, that seems to be doing the trick. I appreciate the input.

  9. #9

    Join Date
    Feb 2007
    Location
    Van Buren, Arkansas
    Posts
    1,943

    Re: Purple line through my scanned negative

    There are several mirrors in a Microtek scanner between the lens (or lenses) and the scanned material, a fleck of dirt on one of these can cause this, as well as a piece of dirt on one of the long thin flourescent tubes that provides the light for the scan. On a Microtek the glassless neg. carriers have a glassless calibration window, the glass carrier has a glass calibration window.

  10. #10

    Join Date
    Nov 2011
    Posts
    16

    Re: Purple line through my scanned negative

    I received the following from Microtek today which backs up what has been said previously. Their English is a little rough but at least they got back to me.

    My name is David Lee, the technical support of Microtek in Taiwan.
    If this pink streaking lines is specific happened on scanned image from Positive / Negative scan, it means there is dirty particles leave on mirror or Reflective Film in Bottom Lamp Assembly as the picture

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