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- From: kassover@rumsey.crd.ge.com (David Kassover)
- Newsgroups: rec.photo
- Subject: Re: Setting up a darkroom...
- Keywords: fogging, developers, darkroom, old enlargers
- Message-ID: <1992Nov17.042013.4411@crd.ge.com>
- Date: 17 Nov 92 04:20:13 GMT
- References: <1e8meuINNlt8@uwm.edu> <1992Nov16.225959.6900@craycos.com>
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-
- >
- >>2 flourescent "bulb-style" fixtures in the ceiling fan, which tend to have
- >>an afterglow.
- >
- >This could be a problem - as I recall, not all of the afterglow from
- >fluorescents is in the visible portion of the spectrum. If they're emitting
- >UV, you're in *big* trouble. Any chance you could:
- >
- >a) remove them while you're printing, or
- >
- >b) cover them with something opaque?
-
- Some years ago, I had the opportunity[requirement] to work in a
- photomicrolithography lab. (I wasn't doing the photography;
- actually I was doing plumbing and other mechanical tasks) The
- fluorescent tubes were normal cool white of some variety or
- other, but they were covered with yellow filters.
-
- I don't believe that this yellow was a particular safelight for
- anything, since there were more normal red safelights available
- for when they were needed. The filters may have been there for
- just such an afterglow as described.
-
- But after eight hours or so in that room, the real world looked
- awfully purple.
-
-
- --
- David Kassover "Proper technique helps protect you against
- uupsi!khazad!kassover sharp weapons and dull judges."
- kassover@aule-tek.com F. Collins
- kassover@ra.crd.ge.com
-