RE: pt/pd stops

[EJ Photo <ejnphoto@sbcglobal.net>]

“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  

 

 

Eric Neilsen Photography

4101 Commerce Street, Suite 9

Dallas, TX 75226

214-827-8301

www.ericneilsenphotography.com

 

SKYPE   ejprinter

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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.

--

Best Wishes,

 

Mark Nelson

Precision Digital Negatives

PDNPrint Forum @ Yahoo Groups

Mark Nelson Photography

 

On Apr 11, 2009, at 2:26:02 PM, "etienne garbaux" <photographeur@nerdshack.com> wrote:

 

From:	"etienne garbaux" <photographeur@nerdshack.com>
Subject:	Re: pt/pd stops
Date:	April 11, 2009 2:26:02 PM CDT
To:	alt-photo-process-l@usask.ca

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