Re: PT/PD MOGULS, MAESTROS & GURUS

["Christina Z. Anderson" <zphoto@montana.net>]

Bob,
Even tho I have hydrochloric acid I have never used it to reduce a print. 
My notes say "palladium is more soluble in strong acids, so if you use 
hydrochloric acid, the traditional clearing bath, your dilution of that 
clearing bath is 0.5%, not 1% as it is with platinum." I, too, am interested 
if this is wrong? And I wonder if it will work when using 
NA2/palladium...hmmm...I have a too dark print, maybe I should just go do 
it.
Chris


> DEAR PT/PD MOGULS, MAESTROS & GURUS ON THIS LIST,
> Please help me resolve what appears to be a conflict in both the
> literature and common wisdom.
> Here are the two conflicting bits of info:
> 1) You must not use a hydrochloric first clearing bath when printing with
> palladium as it will bleach the print, even though the concentration 
> should
> be around 1 to 1.5 %.
> 2) Recently, when I asked the list if there was any way to slightly reduce
> the density of a Palladium print I was told that the concentration of HCl
> necessary to have any effect would be so high that it would be dangerous 
> to
> use in a regular darkroom and might have deleterious effects on the paper.
> I was told to just make another, lighter print.
> *********So, you can see my dilemma.  Is this not a contradiction?  'Tis a
> puzzlement!  Please enlighten me...as it were!
> CHEERS!> BOB