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Thread: Fan in a UV box

  1. #11

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    Quote Originally Posted by Jeremy Moore
    I am building a UV light box according to the specs on http://www.eepjon.com/ubldit.htm


    Do you have a fan in your box and if so, where did you get it? I'm trying to find one locally as I already have ALL of the other materials here. I just don't want to cut the plywood without knowing the size of the fan before I begin.
    You really need a fan in the box. If you don't have one the bulbs will heat up during exposure and light output will fall dramatically, to less than 40-50% of output when the bulbs are kept cool with a fan. You can not see this with your eyes but if you have light integrator the fall-off in output is dramatic.

    Regarding Bill's comment about the BL and SA tubes my testing has consistently shown that the BL tubes print slightly faster than the SAs. But many people agree with Bill's finding and as far as I can determine opinion appears to be about equally divided as to which bulb prints faster. However, there is a slight difference in contrast in the mid-tones between the two lights that results from more belly in the curve of BL prints. This information will be found in the appendix I did for the new edition of Dick Arentz' book on platinum printing which should be out in a few months.

    However, if your intention is to print both Pd/Pd and one of the dichromate colloid processes there is no questio but that the BL tubes is overall much better.

    Sandy King
    Last edited by sanking; 06-20-2004 at 09:00 AM. Click to view previous post history.

  2. #12
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    There is definitely going to be a fan in the box. I'm actually thinking of putting in two as Shinn suggested. One on the left (when looking at the box) to suck air in and one on the right to suck it out.
    Let's see what I've got in the magic trash can for Mateo!

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  3. #13

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    Quote Originally Posted by Jeremy Moore
    There is definitely going to be a fan in the box. I'm actually thinking of putting in two as Shinn suggested. One on the left (when looking at the box) to suck air in and one on the right to suck it out.
    Suck in, suck out grasshopper.....oush...

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