[alt-photo] Re: red spots in pt/pd

[EJ Photo]

Chris, you will notice that back in 1999 if memory serves me well was a
second generation of papers that were good and then went bad period of time
for PT?PD printing. I recall David Michael Kennedy having a whole batch of
Rising's Gallery 100 turn pink on him. 

I would agree that many of these spots can be attributed to bit and pieces
left in it from manufacturing. The rollers, the cutters, the seeds, and
fiber, etc not to mention the sizing both internal and external that clumps,
puddles, foams, etc..  It is paper. Then the solutions can be a problem.
manufacturing and age can both allow platinum metal to form in our salts
leading to very fine streaks, weird patterns, and more. 

Were you experiencing these in our prints today? Or just testing the memory
of aging printers?   lol

Eric Neilsen
Eric Neilsen Photography
4101 Commerce Street, Suite 9
Dallas, TX 75226
 
www.ericneilsenphotography.com
skype me with ejprinter
Let's Talk Photography
 
-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
Christina Anderson
Sent: Saturday, January 21, 2012 10:45 AM
To: Alt List
Subject: [alt-photo] red spots in pt/pd

Found this post very interesting...

>From 1999.

Black spots. Red spots. Pink Pt/PD seemed to be the trouble at the time.


Keith Schreiber (jkschreiber at worldnet.att.net)
Thu, 15 Jul 1999 02:26:01 -0700

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Last year there was a discussion about spots on Pt/Pd prints and Eric 
Neilsen wrote the following: 

>The little black specs I have passed off as impurities in the chemicals 
>or paper, or both. The BIG black spots, as on the Beinfang print can be 
>imperfections in the paper that allow the solution to "puddle" on that 
>spot. And the red spots that I have seen are from the rubber rollers of 
>the paper making process. 

I have just encountered red spots for the first time and am wondering if 
this is speculation or certainty, and does anyone know exactly what they 
are. I am printing palladium developed in K oxalate and cleared in 
sulfite/EDTA. 

The spots don't appear (or at least I haven't noticed them) until well into 
the wash phase. The paper I'm using is the last of a batch of Lenox 
purchased in '96 from Daniel Smith. Up to now it has worked beautifully, but

today 3 of 3 prints on it have red spots. 

Any ideas are much appreciated. Eric? anyone else? 

Regards to all, 
Keith 

Keith Schreiber 
jkschreiber at worldnet.att.net 
Christina Z. Anderson
christinaZanderson.com

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