UV Transparent Glass

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From: Richard Knoppow (dickburk@ix.netcom.com)
Date: 09/24/01-05:54:40 PM Z


  Some time ago I aquired a Morse contact printer. This thing was made for
printing from aerial survey negatives and has 39 little Argon UV lamps in
it. Not intense enough for alt use, but useful for slow silver paper.
  I got it cheap because the glass top had been dropped. I had a new top
made from plate glass but its green and seems to have substantial blocking
of UV (judging from the diming of the fluorescence of the brighteners in
plain paper).
  I was told that clear glass was available only on special order and was
very expensive.
  It seems to me that the UV transmission of glass is of interest to alt
people. So, I am wondering what knowledge might exist on the list about
kinds of glass available for, say, printing frames, which has better UV
transmission than ordinary window or plate glass.
  The current thread on making a printing frame made me think of this.

----
Richard Knoppow
Los Angeles, CA, USA
dickburk@ix.netcom.com


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