These Argon lamps produce a very intense UV output. A simple test will
indicate the relative intensity of the Argon lamps vs. sunlight: insert
a negative in a print frame in front of a sheet of enlarging paper (any
type for this test). Place in direct sunlight for a few minutes and
check the image on the paper. Do the same with the Argon lamps in front
of the negative. You may be surprised.

I have also used B&W paper loaded in a press camera and exposed the
paper until I got a good visible image on the paper (only a few hours at
f8). The printed out images can be fixed in regular fixer. Last
emulsion that I tried (Kodabromide F5) worked ok but the image lacked
contrast. I did not try intensifying or toning the images.

The paper negatives produced using a camera contact printed out ok (must
use a paper with out a water mark.


Richard Knoppow wrote:
"Nermal" wrote in message
news
I have used one of these for printing-out paper. The
exposure time was 2 - 5 minutes. The heat build up during
the exposure time was minimal. I also printed to blue print
paper.

If I had one of these things now, I would print some of my
old negatives to a home made silver chloride coated paper.



Richard Knoppow wrote:

"Thor Lancelot Simon" wrote in message
...


I am very surprized that you got this result. My
experience with printing out paper is that it requires a few
minutes in direct sunlight. The intensity of my Morse
printer is very much below this. They were intended for
printing aerial camera negatives on rather slow contact
paper, something like Azo, with a few seconds exposure time.
The lamps are very low power Argon lamps. BTW, I found a
bunch of the lamps at a ham radio swap meet a couple of
months ago for a dollar each! I don't think the guy selling
them knew what they were.