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  1. #1
    Mainecoonmaniac's Avatar
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    My home made light box

    I took a couple of weekends building it and the black light tubes it came with didn't work well but I got it working. It takes about 40 minutes for a cyanotype while the sun only takes 10 minutes. But here it is.
    Attached Thumbnails Attached Thumbnails IMG_1308.jpg  
    "Photography, like surfing, is an infinite process, a constantly evolving exploration of life."
    Aaron Chang

  2. #2
    bsdunek's Avatar
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    Nice. So, what kind of lamps did you find that work? I wouldn't mind longer exposures if the end result is good - Winter is so cloudy here one can't depend on anything outside.
    Bruce

    Moma don't take my Kodachrome away!
    Oops, Kodak just did!
    For all practical purposes, they've taken Kodak away.


    BruceCSdunekPhotography.zenfolio.com

  3. #3
    Mainecoonmaniac's Avatar
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    The tubes I replaced them with are these actinic tubes.

    http://www.petmountain.com/show_product/11442-505559

    The results are pretty good. With my other black light tubes, the cyanotype emulsion washed off whenI was clearing it in water.
    "Photography, like surfing, is an infinite process, a constantly evolving exploration of life."
    Aaron Chang

  4. #4
    Herzeleid's Avatar
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    FYI, BL350 or BL368 bulbs would significantly reduce the required exposure times. I used these bulbs to build my exposure unit, their output peaks around 365nm.
    http://www.lamps2udirect.com/pages/f...scent_Tube/550

    The ones used for aquariums apparently provide peak output around 420nm. Check this thread http://www.apug.org/forums/forum42/9...rinting-2.html

    My exposures are around 7 to 9 minutes with cyanotypes, both traditional and the new formula.

  5. #5
    Mainecoonmaniac's Avatar
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    Dang. Should have checked the link first. I blew $100 on the tubes and I'll live with them for a while. But for the next round, I'll get the 365 mn tubes.
    "Photography, like surfing, is an infinite process, a constantly evolving exploration of life."
    Aaron Chang



 

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