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Thread: Which is best?

  1. #1

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    Which is best?

    I now have the ability to bend glass tubes and make light! Thinking about what is best to fill tubes with? Flouresent or Mercury, I've been told with this that the mercury filled tubes warm up quickly to full power. Wanting to develope a working proto type and of course for myself. Of course I want this to be able to do carbon and platinum prints.

    James

  2. #2

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    James,

    I'm not sure what you are asking here. Are you a neon or cold cathode sign fabrication shop? While it is possible to make a 'mercury' bent tube lamp without any phosphers, it is not the same as a mercury HID lamp that is commonly used in graphics arts machines.

    Be very careful with mercury loaded lamps that do not have any phosphers. The high energy UV light (UV-B and UV-C) that is emitted by an uncoated lamp is very damaging to your skin and eyes, even with reasonably short exposure. Even coated lamps can cause problems if you are not careful. I never work around my exposure units without wearing a pair of UV protection goggles. They are readily available from home centers; check to make sure they have a very high UV absorption rate.

    I recommend that if you are thinking of using a bent tube lamp arrangement, you might want to look at the sensitivity curve of the particular process you are interested in, and dope the tubes with appropriate phosphers to meet the peak sensitivity.

    If you are not going to be using a light integrator, then you will probably turn on the lamp and leave it on for the entire printing session, so warmup time is somewhat irrelevant. With an integrator timer, the warmup becomes somewhat irrelevant also, so generally, warmup is a non-issue, unless you are planning to be controlling the light without the use if an integrator, which I don't like, because it can cause some inconsistancy problems.

    ---Michael
    www.mutmansky.com
    B&W photography in Silver, Palladium, and gum bichromate.

  3. #3

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    Quote Originally Posted by Michael Mutmansky
    James,

    I'm not sure what you are asking here. Are you a neon or cold cathode sign fabrication shop? While it is possible to make a 'mercury' bent tube lamp without any phosphers, it is not the same as a mercury HID lamp that is commonly used in graphics arts machines.

    Be very careful with mercury loaded lamps that do not have any phosphers. The high energy UV light (UV-B and UV-C) that is emitted by an uncoated lamp is very damaging to your skin and eyes, even with reasonably short exposure. Even coated lamps can cause problems if you are not careful. I never work around my exposure units without wearing a pair of UV protection goggles. They are readily available from home centers; check to make sure they have a very high UV absorption rate.

    ---Michael
    I run a medical DME company but the guy next to me does neon and whatever else. He has been showing me how to bend glass tubes which is a art form in itself. Yet though the going price for tubes even bent in our needs is fairly cheap, cheaper than straight tubes.

    I'll be going with 10mm tubes, smaller round the tube more light it puts out. I'll be doing a 20"x24" which will take about 40' of tube. It's a fraction of the price as if I went with regular tubes and have a custom look. Right now I'm considering Mecury loading them with argon gas which he buys from me. If I can make this work I see no problem with the idea of taking an old Beseler light head and being able to enlarge by simply gutting out the head and placing circlalur tubing within it?

    James

    Ps I'm more interested in carbon then any other process.



 

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