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Thread: Contact printing glass plates...?

  1. #11
    Roger Thoms's Avatar
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    Re: Contact printing glass plates...?

    Quote Originally Posted by Jim Noel View Post
    I use the glass negatives in place of the original glass. Good contact, pressure no problem.
    Exactly what I do, at least for the one J Lane plate I contact printed. Worked like a charm.

    Roger

  2. #12
    Nodda Duma's Avatar
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    Re: Contact printing glass plates...?

    Quote Originally Posted by Randy View Post
    Paul - I have one of those orange printing frames. Yes, it seems to apply a lot of pressure, that is what I feared. I have a glass plate that got messed up in development. I'll experiment with it to make sure it won't crack.

    Jason, when I laid one of your glass plates on my cyanotype paper, the plate was not heavy enough to make uniform contact all around, the paper was slightly warped after I had coated it and it dried. I think I will have to at least lay a heaver glass over it during the exposure.
    Randy, gotcha.. I freely admit that I am a novice at contact printing cyanotypes.
    Newly made large format dry plates available! Look:
    https://www.etsy.com/shop/Pictoriographica
    .. because my wife is happy when I can cover my photography expenses!

  3. #13

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    Re: Contact printing glass plates...?

    Quote Originally Posted by Randy View Post
    ...And no problem with any newton rings? I know I got newton rings when I scanned a glass plate recently, I just assumed that could be a problem when contact printing with a printing frame.
    Occasionally , but not often.

  4. #14

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    Re: Contact printing glass plates...?

    Quote Originally Posted by Randy View Post
    ...And no problem with any newton rings? I know I got newton rings when I scanned a glass plate recently, I just assumed that could be a problem when contact printing with a printing frame.
    No newton rings. I get them too when scanning if I put the shiny side of the plate down, so I just don't do that. No problem with contact printing though.
    Edit: I must add that I put a thin sheet of mylar between the glass negative and the glass of the printing frame, mostly to prevent scratches, but maybe it also helps preventing newton rings.
    Last edited by koraks; 6-Jun-2018 at 03:20.

  5. #15

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    Re: Contact printing glass plates...?

    I've been using my (old) printing frames (including glass) with my glass plates with no issues whatsoever so far.

    Robert

  6. #16

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    Re: Contact printing glass plates...?

    I have a 5x7 glass plate printer from the 1920s, if your interested I listed it over a month ago, or you might be able to replicate the basics. I used it 20 years ago and it worked fine. Where the silver flat piece is with the handle is what pushes down on the plate it has a piece of cotton like material that was glued to the flat silver it was about 1/4 " thick. Each one of the switches on the green front control 12 tiny bulbs for dodging and burning. Click image for larger version. 

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  7. #17
    multi format
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    Re: Contact printing glass plates...?

    Quote Originally Posted by Nodda Duma View Post
    Just lay the plate on the paper. Works really nice (pardon my sad, amateur attempts)




    To avoid newton rings on scanning, place emulsion side against the platen and flip in post processing.
    yup

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