[alt-photo] Re: Metal halide lamps in plate burners and ozone???

[ender100]

may just be that the entire unit is drawing more power and affecting 
fan speed.
--
Best Wishes,

Mark Nelson
Precision Digital Negatives
PDNPrint Forum @ Yahoo Groups

Mark Nelson Photography


On Apr 16, 2010, at 8:37:48 AM, "Loris Medici" 
<mail at loris.medici.name> wrote:

 From:  "Loris Medici" <mail at loris.medici.name>
Subject:    [alt-photo] Re: Metal halide lamps in plate burners and 
ozone???
Date:   April 16, 2010 8:37:48 AM CDT
To: "'The alternative photographic processes mailing list'" 
<alt-photo-process-list at lists.altphotolist.org>
Dear Bob,

I noticed that the plateburner slows down the speed of the exhaust fan 
on
the top during exposure -> do you think that's because of ozone 
generation?
I don't know how ozone smells and I don't notice any additional smell 
in the
room during or right after exposure. Go figure! Can you describe the 
smell
of ozone? (If that's possible...)

Thanks,
Loris.


-----Original Message-----
 From: alt-photo-process-list-bounces at lists.altphotolist.org On Behalf 
Of BOB
KISS
Sent: Friday, April 16, 2010 4:27 PM
To: 'The alternative photographic processes mailing list'
Subject: [alt-photo] Re: Metal halide lamps in plate burners and 
ozone???

DEAR LORIS,
I have my plate burner (also NP80 bulb) right under my exhaust fan
in the ceiling so I don't have an ozone problem but when I had it 
previously
located in a smaller darkroom, I could smell ozone during and 
immediately
after exposure. However, I used to open the darkroom door and put on a 
fan
during exposure because ambient room light won't cause any problems to 
the
sensitized material under your neg in the vacuum frame.
CHEERS!
BOB

-----Original Message-----
 From: alt-photo-process-list-bounces at lists.altphotolist.org On Behalf 
Of
Loris Medici
Sent: Friday, April 16, 2010 7:21 AM
To: 'The alternative photographic processes mailing list'
Subject: [alt-photo] Metal halide lamps in plateburners and ozone???

Hi all. Now that I have/use a NuArc plateburner, I was wondering if the
lightsources of this and similar devices generate ozone? I have the
plateburner in a not too big room (14m2 / 150 sq. ft.), should I be
concerned with the amnt. of ozone that will be - presumably - 
generated?

TIA,
Loris.

P.S. The plateburner I have uses a NuArc NP80 lightsource. See its 
spectral
power distribution chart here:
http://www.tcsuvlamps.com/products/222_files/diazo_graph.jpg

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