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  1. #1
    dodphotography's Avatar
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    Van Dyke / Cyno - Idea w/ Enlarger

    Hey everyone, I got to thinking and was curious if someone could help me or simply tell me I'm wrong.

    If we coat some paper with the appropriate chemistry... what is to stop you from enlarging a negative onto the paper if your head was fitted with a UV bulb? Or, are UV bulbs not available for enlargers?

    Why must these always be contact printed?

    Thanks,
    Dan
    Daniel-Duarte.com

  2. #2
    cliveh's Avatar
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    I think there has already been a thread or two on this and the outcome was it wont work (not enough UV output).

    “The contemplation of things as they are, without error or confusion, without substitution or imposture, is in itself a nobler thing than a whole harvest of invention”

    Francis Bacon

  3. #3
    Hexavalent's Avatar
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    "Regular" optics do not fare well with UV, specialty ($$$) glass is required. As VDB, cyanotype, etc., are very slow processes compared to silver-gelatin, exposure times are very long. The Fresson lab in France does use an enlarged negative system, but exposures take hours even with an arc lamp, and the negatives get rather cooked in the process.
    - Ian

  4. #4
    Bob Carnie's Avatar
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    I have only seen one Fresson Print by Shelia Metzner (sp)

    Can you direct me to artists that use this process regularly or where I can see a collection of these prints.

    thanks

    Bob
    Quote Originally Posted by Hexavalent View Post
    "Regular" optics do not fare well with UV, specialty ($$$) glass is required. As VDB, cyanotype, etc., are very slow processes compared to silver-gelatin, exposure times are very long. The Fresson lab in France does use an enlarged negative system, but exposures take hours even with an arc lamp, and the negatives get rather cooked in the process.

  5. #5
    MDR
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    Luis Nadeau operates a Fresson Lab in Canada

    Luis Nadeau
    P.O. Box 221 Station A
    Fredericton NB
    Canada E3B 4Y9

    Scott Macleay works in the Fresson Process another Canadian
    www.scottmacleay.com

  6. #6
    Bob Carnie's Avatar
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    Not so sure Mr Nadeau is actually making prints, I have a couple of his books which are quite good, but if he is printing, he is not showing .

    I will look into Scott Macleay work

    thankyou.


    Quote Originally Posted by MDR View Post
    Luis Nadeau operates a Fresson Lab in Canada

    Luis Nadeau
    P.O. Box 221 Station A
    Fredericton NB
    Canada E3B 4Y9

    Scott Macleay works in the Fresson Process another Canadian
    www.scottmacleay.com

  7. #7
    Hexavalent's Avatar
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    AFAIK, Luis hasn't been making Fresson prints for quite a while, focusing rather on conservation work. He used large negatives for exposure, rather than a UV enlarger.
    - Ian

  8. #8
    Bob Carnie's Avatar
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    thanks I thought so what does AFAIK mean , I am over 60 and slow now

  9. #9
    MDR
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    Bob since you are canadian you probably had some french in school so you can probably contact the Fresson family and get some informations regarding the homemade enlarger it seems they used this method only for the mono fresson process and not the four colour process which requires separations negatives. They used an arc lamp for cinematic projectors as UV source and built the enlarger around it. Note: Rodenstock made a UV enlarger lens the UV-Rodagon.
    email: fresson@atelier-fresson.com

  10. #10
    MDR
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    Just found that Pentacon build and sold and UV enlarger in the 1960's it was called the Pentacon Multifoc UV. a bit more info: http://books.google.at/books?id=NrEW...ed=0CFMQ6AEwBQ
    and an article in german http://www.gigabitfilm.de/download/uv_projektor.pdf

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