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  1. #1
    ced
    ced is offline

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    Black Light Bulbs

    Excuse if already posted. Would these bulbs be good for Gum Printing as they are for Cyanotypes please?
    (http://www.velleman.eu/products/view/?id=381476)
    They are already installed at home and make excellent Cyano's but I want to make Gum's too.

  2. #2
    Uncle Goose's Avatar
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    If they do Cyano's then they will do gum's too.
    Sure, I could give you a boring explanation who I really am but I rather let the Origami do the talking.

  3. #3
    ced
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    U.G. Thanks for responding and what do you think the difference in exposure time if you have experience with this method?

  4. #4

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    Ced, that highly depends on the pigment / dichromate / gum content and coating thickness of your emulsion. For my usual working procedures, gum was around 2 stops faster than trad. cyanotype. But this is absolutely non applicable to your working conditions / style. You'll have to test it for yourself.

    Regards,
    Loris.

  5. #5
    ced
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    L.M. Thanks for this info it might just be a pointer!



 

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