From: Chris Read (chris.read1@btinternet.com)
Date: 01/21/01-03:40:56 AM Z
Thanks very much for the info Judy - I can use your tube spec to ask around
here in the UK. BTW, I should have mentioned that the sunlamp I currently
use has four 7 inch UV tubes in front of a reflector, so image fall off isnt
such a problem as it would be with a single bulb.
I bought the lamp from Argus here in the UK for about 40 pounds, and its
convinced me that I can 'do' small-sized blueprint, VDB etc, before moving
on to larger formats.
Thanks again,
Chris
> On Sat, 20 Jan 2001, Chris Read wrote:
>
> > Your contact frame sounds great - I'm planning on improving my current
rig
> > which is simply a chain store sun-lamp, only good for 8x10 (though very
> > effective).
>
> Oh I hate to be a spoilsport but somebody's got to do it -- have you done
> a perimeter test? That is, I found light falloff very steep from a
> one-bulb sunlamp. Tho that was a thrift store model. Maybe chain stores
> are better? Also it's probably 500 watts, expensive, slow warm up, short
> life -- & makes HEAT in the summer.
>
> > A couple of questions: - what kind of UV tubes do you use, and are they
easy
> > to get? And how do you do test strips with your set-up?
> >
>
> I use BL (note that's NOT BLB) fluorescents... they cost from $10 to $14
> apiece in the 24 inch length, take 20 watts of electricity each, and make
> no heat (heat if any is from the ballasts, but still not in it with
> sunlamp heat). They're rated for 7 to 9000 hours.
>
> They're very easy to get in NYC, but I don't know about the outer planets.
> Let me suggest internet, or, Post-Factory lists Bulb Direct, 800/772-5267
> and Top Bulb Co, 800/867-2852 (quoted BL at $10.58 about a year & a half
> ago). Or maybe Champion Lighting, 800/673-7822. All have websites, but
> I'm too bleary at this moment to copy the URLs. maybe someone else has
> some other sources. Does Home Depot (not present in the big apple) have
> BL? Or???
>
> I do test strips just like you do (I think). Tape the 21-step to the piece
> of paper & put neg down on the plate glass. Plate glass the second goes
> on top, and weights over that. As noted, this is the one instance in which
> contact can be soft, because the strips will wiggle -- but then, I tend to
> use tiny scraps of paper for tests. If you use a more generous size, won't
> wiggle. I generally do 5 or 6 or more at a time. Tho maybe there's a
> question there I'm not following (I SAID I'm bleary !); if so ask
> again....
>
> Judy
> ....................................................................
> | Judy Seigel, Editor >
> | World Journal of Post-Factory Photography > "HOW-TO and WHY"
> | info@post-factory.org >
> | <http://rmp.opusis.com/postfactory/postfactory.html>
> .................................................................
>
>
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