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Thread: Can it be a solution for avoiding newton rings

  1. #31
    Peter De Smidt's Avatar
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    Re: Can it be a solution for avoiding newton rings

    And I have a lot of experience making 6000 spi scans using it. BTW, anti Newton acrylic is used by Screen for both the scanning bed, and for hold-down sheets.
    “You often feel tired, not because you've done too much, but because you've done too little of what sparks a light in you.”
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  2. #32
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    Re: Can it be a solution for avoiding newton rings

    Quote Originally Posted by Hugo Zhang View Post
    Found this one:

    http://fpointinc.com/glass.htm

    But its online ordering is not working and don't know if it is still in business.
    No, Mike closed the business last year.

  3. #33
    Drew Wiley
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    Re: Can it be a solution for avoiding newton rings

    I doubt I'd want acrylic underneath a neg. It's not even the correct kind of acrylic. Scratches easily, hydrates and dimensionally unstable, electrostatic. But it's easy to size, relatively cheap, and doesn't shatter. There is also an advantage to something a bit heavier if gravity is the primary factor in a carrier rather than compression clips. Acrylic would be a non-starter for any kind of registration work. But it's certainly worth experimenting with.

  4. #34

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    Re: Can it be a solution for avoiding newton rings

    Folks,

    Here is a URL from APUG now photrio. They had similar questions.

    http://www.apug.org/forum/index.php?...ements.135849/
    Principal Unix System Engineer, Yoyodyne Propulsion Systems

  5. #35
    Peter De Smidt's Avatar
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    Re: Can it be a solution for avoiding newton rings

    Quote Originally Posted by Oren Grad View Post
    No, Mike closed the business last year.
    He likely sourced the glass from somewhere. He might have cut it, but I doubt he made the texture.
    “You often feel tired, not because you've done too much, but because you've done too little of what sparks a light in you.”
    ― Alexander Den Heijer, Nothing You Don't Already Know

  6. #36
    Drew Wiley
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    Re: Can it be a solution for avoiding newton rings

    His glass worked fairly well for LF enlargements and flatbed scanners. A bit too coarse for MF combined with very high MTF Apo enlrgr lenses. There are just too many potential variables to give a legitimate generic answer.

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