My home made light box

Discussion in 'Alternative Processes' started by Mainecoonmaniac, Jan 28, 2013.

  1. Mainecoonmaniac

    Mainecoonmaniac Subscriber

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    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.
     

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  2. bsdunek

    bsdunek Subscriber

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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.
     
  3. Mainecoonmaniac

    Mainecoonmaniac Subscriber

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  4. Herzeleid

    Herzeleid Member

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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/...V_Actinic_05_Ultraviolet_Fluorescent_Tube/550

    The ones used for aquariums apparently provide peak output around 420nm. Check this thread http://www.apug.org/forums/forum42/94757-metal-halide-lamps-printing-2.html

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

    Mainecoonmaniac Subscriber

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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.