Re: PT/PD Mogules, Maestros & Gurus
Bob and other gurus,
More is
revealed! Nadeau on page 64 of the publication cited below also
states that
"An overexposed palladium print can be easily reduced if it is
left for 15
minutes or more in the regular HCl clearing bath (1 part HCl, 60
parts of
water)."
He goes on to say that a Platinum image is difficult to reduce
and that in
practice it is much easier and cheaper to discard the
overexposed print and
make a new one.
Sorry I wasn't able to include
that info in the original post.
John
Roseborough
aka
Platinumprinter
----- Original Message -----
From: "BOB KISS" <bobkiss@caribsurf.com>
To: "'John
Roseborough'" <platinumprinter@msn.com>
Sent:
Tuesday, February 13, 2007 1:12 PM
Subject: RE: PT/PD MOGULS, MAESTROS &
GURUS
> Thanks John,
> The reduced concentration of HCl is
because of the fear of bleaching
> the palladium image but the recent
posts tell me that I would need a
> dangerously concentrated HCl solution
to slightly reduce the density of a
> slightly dark palladium print and
that the concentrated HCl would damage
> the
> paper.
>
Soooooooooooooo, we have now found one of the sources of the
>
contradictory information...any one care to resolve this?
>
CHEERS!
> BOB
>
> -----Original Message-----
> From:
John Roseborough [mailto:platinumprinter@msn.com]
> Sent: Tuesday,
February 13, 2007 2:59 PM
> To: alt-photo-process-l@usask.ca
>
Subject: Re: PT/PD MOGULS, MAESTROS & GURUS
>
>
Eric,
>
> In "The History and Practice of Platinum Printing" by Luis
Nadeau (2nd
> edition) page 32, Nadeau states that HCl is to be used
highly diluted to
> 1% - 1.5% for Platinum and 0.5% for
Palladium.
>
> John Roseborough
>
> ----- Original
Message -----
> From: "Eric Neilsen" <ejnphoto@sbcglobal.net>
> To:
<alt-photo-process-l@usask.ca>
>
Sent: Tuesday, February 13, 2007 8:46 AM
> Subject: RE: PT/PD MOGULS,
MAESTROS & GURUS
>
>
>> Chris, WHERE is that note taken
from?
>>
>> Eric Neilsen Photography
>> 4101 Commerce
Street
>> Suite 9
>> Dallas, TX 75226
>> http://e.neilsen.home.att.net
>>
http://ericneilsenphotographycom
>>
Skype ejprinter
>>
>>> -----Original
Message-----
>>> From: Christina Z. Anderson
[mailto:zphoto@montana.net]
>>> Sent: Tuesday, February 13, 2007
8:43 AM
>>> To: alt-photo-process-l@usask.ca
>>>
Subject: Re: PT/PD MOGULS, MAESTROS & GURUS
>>>
>>>
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
>>>
>>
>>
>>
>>
>
>
>
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