[alt-photo] Re: Alt-photo-process-list Digest, Vol 499, Issue 1

Mark Nelson ender100 at aol.com
Sat Oct 1 16:53:37 GMT 2011

A friend of mine found that he had a consistent 50% humidity year around in his basement until I checked my hygrometer against his and found his was broken and stuck at 50%.  ;)

All of the problems you described are consistent with too little moisture and uneven moisture in the paper at the time of exposure.

Best Wishes,
Mark Nelson

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On Oct 1, 2011, at 10:31 AM, eric nelson wrote:

> Actually the older Platine I still have left was unworkable as well and this
> is my first use of Cot 320 so I have no older samples of that.
> FO was made fresh and always distilled.  When you say 'they hang to dry' who
> does that?  I assume you mean drying the sensitizer.  That's why I am
> testing the different set times after coating but I'm not air drying, just
> using a cool setting on the hair dryer which is fairly cool air and at this
> point only allowing the sensitizer to sit for a maximum of 5 minutes.
> I was thinking the same thing re:sizing but Platine's similar failure
> overrode that thought and made me think that something else is afoot.  I'll
> also be talking to Bergger re:rejecting this paper as your point makes
> sense.
> Did you mean FO when you said, 'With freshly made batch of Pot Ox'?
> The only thing different that I did in mixing the FO is I used .4gms of
> chlorate for #2 instead of the usual .6 that is recommended for Pd as when
> these jobs started they were going to be Pd/Pt prints.  Client decided he
> liked the warmth of Pd and warm pot. oxalate and those prints worked out
> ok-ish with no solarization on Cot 320, but some unevenness issues creeping
> in here and there creating lots of reject prints.
> Now I'm working on another client's work (with the images I've been posting)
> using the same techniques as before except now I'm using ammonium citrate
> for cooler tones.
> Re:Mark's comment on humidity; there may be less humidity here now than
> during my earlier printing sessions which were early this month.  It just
> seems weird to need a humidifier in what is basically a basement, but I'm
> going to try running my evaporative humidifier before my next set of tests.
> Message: 20
> Date: Fri, 30 Sep 2011 20:36:32 -0500
> From: "EJ Photo" <ejnphoto at sbcglobal.net>
> To: "'The alternative photographic processes mailing list'"
>       <alt-photo-process-list at lists.altphotolist.org>
> Subject: [alt-photo] Re: Palladium Failures
> Message-ID: <58FB8A05CB2A4ACCABE419B18DCA0957 at Eric64>
> Content-Type: text/plain;       charset="us-ascii"
> If it were me, I'd find an old friendly batch piece that was keep around
> that used to work fine. I'd start small and use the chemistry like I always
> had before on it. If it works fine then the papers that you are now using
> would be suspect #1 and 2. If you have a failure with that, look to your
> mixing. Distilled? FO fresh? came from ?
> With freshly made batch of Pot Ox try the same. Paper fiber might be an
> issue with soaking too long. I read here that they hang to dry, but I have
> only notice more paper fiber coming into the picture that way.
> A circular pattern indicates a bad sizing to me, especially if the circle
> has smaller global regions attached.  I'd reject the paper.
> Eric Neilsen
> Eric Neilsen Photography
> 4101 Commerce Street, Suite 9
> Dallas, TX 75226
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