From: Carl Weese (cweese@earthlink.net)
Date: 11/02/01-02:38:34 PM Z
Nick,
Under normal circumstances (whatever they are) even two-three minutes
exposure to UV tubes should give a rich black tone to "border" areas. The
tubes certainly shouldn't be gone with that little use, though I'm familiar
only with standard GE BL tubes, not actinics. Something could be wrong with
the paper, the coating procedure, the humidity level you are working at,
etc, etc. IOW, it looks like there is a basic problem that has nothing to do
with the negative you are testing. How old are your chemicals, could they
have been contaminated, what coating procedure, what humidity, what paper??
---Carl
--
web site with picture galleries
and workshop information at:
http://home.earthlink.net/~cweese/
----------
>From: Nick Makris <nick@mcn.org>
>To: alt-photo-process-l@sask.usask.ca
>Subject: Re: Platinum/Paladium testing
>Date: Fri, Nov 2, 2001, 3:10 PM
>
> Carl, I was hoping to catch your interest, many thanks for the response.
> Your concern for the adverse affects of chlorate may be correct in some
> circumstances, however consider that on other tests in this series, with
> exactly the same parameters except:
>
> One with 0 PC and 0 PT the blacks were somewhat flat.
> One with 0 PC and 1 PT the blacks were also somewhat flat.
>
> Also, since my post earlier today, I made another test in which I extended
> the exposure to 7.5 minutes without getting any closer to maximum density.
> This is somewhat confusing.
>
> I also changed my developer only to find that I now have slower speed in the
> sensitiser.
>
> Could my Super Actinic bulbs be going out???? They are about 2 years old
> and I probably have made less than 100 prints with them. That might account
> for my unanticipated change in density - recall that I wrote:
>
>> For no apparent reason, a specific time I was using was no longer
> producing the same density
>
> Thanks again,
>
> Nick
>
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