Re: Here is why my UV print exposures were so erratic...

From: Mike Klemmer ^lt;[email protected]>
Date: 01/24/04-07:16:19 AM Z
Message-id: <001101c3e27c$41987b40$0200a8c0@downstairs>

I was getting lots of crazy results...splotchy prints and stuff like that.

I figured it out while was running a calibration and at one point had to reset the negative on the paper. I saw ghosting of the numbers on the print that clued me in to what was going on. It's funny because this paper (rising stonehenge) I was coverimg the print with is quite thick.
  ----- Original Message -----
  From: Ender100@aol.com
  To: alt-photo-process-l@sask.usask.ca
  Sent: Friday, January 23, 2004 10:37 PM
  Subject: Re: Here is why my UV print exposures were so erratic...

  Was it giving you a nice pattern of the cover paper texture on your final print?

  In a message dated 1/23/04 11:12:09 PM, mklemmer@comcast.net writes:

    For the longest time I could never figure out why my kallitype exposures were so erratic from print to print. Sometimes too dark... sometimes too light. I came up with every possible explanation under the sun, but tonight I finally figured it out...the real reason.

     

    What I was doing was allow the mercury vapor UV lamp to fully warm for 5+ minutes while covering up the print in the vacuum frame with heavy stock cotton paper. Well it turns out that the paper I was covering it with is not UV opaque! It was getting significant exposure before the exposure.

     

    So I finally figured it out quite by accident and thought I would share. Fortunately, now I have a working integrator so I won't have to warm up the lamp and time my exposures.
Received on Sat Jan 24 07:19:51 2004

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