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Thread: 3M Rapid Access Negative - Orthochromatic

  1. #1

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    3M Rapid Access Negative - Orthochromatic

    I acquired in the title mentioned box of 13x18 film when getting my L138S. The aquistion was through another person, I had no opportunity to ask the former user. No info could be found when I tried to search on the web.
    Could you, please, share any information regarding processing this type of film? I will begin with tests anyway but starting point would be apreciated.
    The box has been opened, I can estimate by weighing there is still plenty of sheets left inside, the box is quite hefty...
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  2. #2
    Tin Can's Avatar
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    Re: 3M Rapid Access Negative - Orthochromatic

    No idea

    but will be usable!
    Tin Can

  3. #3

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    Re: 3M Rapid Access Negative - Orthochromatic

    Closest I could find, and the specs match, is this -

    https://www.gwjcompany.com/index.php...oducts_id=2419

    I'm curious, what is your L138S ?

  4. #4

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    Re: 3M Rapid Access Negative - Orthochromatic

    Quote Originally Posted by Jim C. View Post
    Closest I could find, and the specs match, is this -

    https://www.gwjcompany.com/index.php...oducts_id=2419

    I'm curious, what is your L138S ?
    Thank you, Jim. This could be very close. I will aim to some POTA like development and see what it yields.
    L138S = Durst Laborator 138S. Your suggestion with copy film does make sense, because there was copy accessories included when I bought it, i.e. Durst copy ligths and copy sheet holder.

  5. #5

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    Re: 3M Rapid Access Negative - Orthochromatic

    'Rapid Access" is a term invented in the 1990s to describe a new generation of high-contrast graphic-arts films. They used different, faster-acting process chemicals and replaced the old familiar "Kodalith" type emulsions. So your idea of a low-contrast developer to test this film is probably a good one, if you want any gray tones at all. But let us know how it turns out>

  6. #6

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    Re: 3M Rapid Access Negative - Orthochromatic

    Thanks for the clairifcation of 138S, I'm not familar with Durst model numbers.

    If the film is viable, aside from trying it with a low contrast developer, you could use it
    for printing masks ( ie: mask one area of the paper for exposure )

    Jim C.

  7. #7

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    Re: 3M Rapid Access Negative - Orthochromatic

    Dilute paper developer like dektol 1:50 might work will for masks. With the current ortho lith films the results are very similar to what I got with POTA for masking, and it’s much easier to use.

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