Marek, I am asking not just
for general information, but also as Chris is not a platinum/palladium printer,
she may not be aware of the variety of solution strengths that printers use. And
while some of use one solution strength, others use an entirely different
amount. When we use the words standard and traditional, they may be yours but
they may not be mine. I am not giving you a hard time here, just clarifying. I
have seen several different “traditional” concentrations quoted
over the years. Some may not use a sodium tetracholoropalladate , but rather
mix Sodium Chloride and Palladium Chloride. All these variations can add up to
a lot when someone like Chris is asking what appears to be a basic question. Some
talk in terms of molar solution strength and other in percentages.
And you print with paper that is heat dried? Air dried,
humidified, etc.
I might mention to Chris to look into the project going on at the
Getty Conservation Institute about alternative printing. You might be able to
get more information there too.
Eric Neilsen
4101 Commerce Street, Suite 9
Dallas, TX 75226
214-827-8301
www.ericneilsenphotography.com
SKYPE ejprinter
From: Marek Matusz
[mailto:marekmatusz@hotmail.com]
Sent: Thursday, April 16, 2009 9:09 PM
To: alt-photo-process-l@usask.ca
Subject: RE: pt/pd stops
OK
Eric,
Here is the technical details
sodium tetracholoropalladate, standard concentration 0.1564 g Pd/cc solution
Ferric oxalate 26%. Ferric oxalate is homemade via the nitric acid route. It is
the nicest I ever tested and keeps forever.
Exposure 5 minutes in a bank of BL bulbs, developed in a standard POTA
solution (the solution is very old, just replenished).
Marek
Date: Thu, 16 Apr 2009 17:03:43 -0500
From: ejnphoto@sbcglobal.net
Subject: RE: pt/pd stops
To: alt-photo-process-l@usask.ca
It would be worth more if you specified some of your chemical
sources and solution concentrations. Your printing parameters could also be
useful.
Eric
Eric Neilsen
4101 Commerce Street, Suite 9
Dallas, TX 75226
214-827-8301
www.ericneilsenphotography.com
SKYPE ejprinter
From: Marek Matusz
[mailto:marekmatusz@hotmail.com]
Sent: Thursday, April 16, 2009 3:39 PM
To: alt-photo-process-l@usask.ca
Subject: RE: pt/pd stops
For
what it's worth, I just printed a 21 step tablet with some other
calibrations stuff that I am working on in pure Pd, 13 steps visible on a 21
Stouffer guide.
Marek
Date: Tue, 14 Apr 2009 17:42:03 -0500
From: ejnphoto@sbcglobal.net
Subject: RE: pt/pd stops
To: alt-photo-process-l@usask.ca
Chris, I am taking advantage of a refine edges on a rather large
file to answer. I think that you’ll find that there is no one coating
solution/developer mixture that enough people use to be definitive. The Ziahype
might just be a name, but the print out process is for real. There tonal scale
is no less valid than a traditional FO. Also there is no set standard coating
mixture or even a qualified solution concentration. These are real issues
for anyone trying to map out the scale of PT/PD solutions. You best do your own
and specify how, what , where, when , why, etc. and then you’ll still
have people that “know better” question your product.
Look at Ware’s appear on the issue of pt pd solution and
yield. It is however written with the AFO, Ammonia based chemistry, much of the
principles hold true for FO traditional chemistry through my experience.
And as for printing with a 1 , 0, or 00 filter? All the time. I
may not use it for the whole exposure, but you be sure that those filters see
the enlarger often.
Eric
Eric Neilsen
4101 Commerce Street, Suite 9
Dallas, TX 75226
214-827-8301
www.ericneilsenphotography.com
SKYPE ejprinter
From: Christina Z.
Anderson [mailto:zphoto@montana.net]
Sent: Monday, April 13, 2009 9:42 AM
To: alt-photo-process-l@usask.ca
Subject: Re: pt/pd stops
Thanks
for the answers. I am getting that one can print over 10 stops (wow).
Eric,
I am interested in just platinum and palladium and combinations thereof, not
Ziatype or whatnot.
I
am interested in the utmost capability of a pt/pd print in terms of stops--to
compare with bw, cyanotype, gum, etc. I have gone back and started reading Mike
Ware's Cyanotype book again and find it is SO worth reading because each time I
return to it I find more. More on this later with extending cyanotype's
range.
It
is not a question of "my pt/pd steps are bigger than yours" :)
nor does it relate to those printing gorgeous prints from midtone to black with
no white...
In
the BW darkroom I did an interesting visual of printing a Stouffers with
every filter in the Kodak filter pack to illustrate the tonal range/number of
stops each filter produced. Very illustrative of the effect of
filters! I'm tempted to post one more visual :)
But
no one would print with a 1 or 0 filter which, if memory serves correctly and I
am too lazy to go get the step wedge prints, gave the longest tonal
range.
etc.
etc. gotta go teach...
-----
Original Message -----
Sent: Sunday, April 12,
2009 10:11 PM
“Moisture
at the time of exposure will also make a difference.”
Chris,
the process is not static. I have certainly fill out/ used up all the steps on
a standard stouffer tablet. I have not , as Mark, gone out on bought the
extended version. There are of course many variations of PT/PD combinations and
combinations of FO/AFO ( and others) so the question is are you looking to see
what is the longest scale that can be achieved with any combination? Or
specifically just a PT/PD combination?
I
don’t normally tell people to shoot for a range bigger than 2.2, simply
because getting longer scale is more difficult than some want to work. They can
get lost in the scale and lose the trees. We are after all making pictures not
printing grayscale patches for fun, The painters have covered that ground
although I have seen some photographers doing much the same. Hey if it
works….
Eric
From: ender100
[mailto:ender100@aol.com]
Sent: Sunday, April 12, 2009 12:00 AM
To: alt-photo-process-l@usask.ca
Subject: Re: pt/pd stops
Chris,
With pure Palladium, I am getting
over 10 stops—I bought a 41 step tablet because of this!
Moisture
at the time of exposure will also make a difference.
On
Apr 11, 2009, at 2:26:02 PM, "etienne garbaux" <photographeur@nerdshack.com>
wrote:
Chris wrote: >Can someone tell me the greatest amount of stops they have gotten >with pt/pd? Or put it in terms of logs or DR, if that's how you do it. I use the traditional formula, 100% Pt, no contrast agent, and you can clearly see all 31 steps of a 3.05 wedge on the very smooth, very white papers I favor. That is the exposure scale, of course -- the print Dmax is generally 1.5 or so. I usually make negatives with a DR of 3.1-3.2 for this process (which limits one's choice of films). Best regards, etienne
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