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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!


    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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