From: Carl Weese (cweese@earthlink.net)
Date: 12/10/02-04:34:52 PM Z
Sandy,
Cesium and lithium and ammonium and maybe others can all be made into double
salts with palladium chloride, and these can then be used as part or all of
the metals component of the ferric/metals solution mix to make the
sensitizer. Additives like tungsten can also be tossed in. I did some
testing with these combinations and wrote up those preliminary ventures in
"The New Platinum Print"--Witho's experiments extend well beyond those quick
trials and I don't know who else might have been exploring in the meantime.
TNPP also includes instructions for Dick Sullivan's gold-toning technique as
well as some tables indicating what to expect when combining the various
develop-out and POP chemical combinations. Don't know if it's covered
elsewhere. I don't think there's an extensive published treatment of, what
to call it, exotic Pt/Pd variations for color.---Carl
--
web site with picture galleries
and workshop information at:
http://home.earthlink.net/~cweese/
----------
>From: Sandy King <sanking@clemson.edu>
>To: alt-photo-process-l@sask.usask.ca
>Subject: Re: Question about pt/pd
>Date: Tue, Dec 10, 2002, 4:25 PM
>
> Carl,
>
> Thanks for your reply. When Witho was here he showed me some of his
> split-toned work but I was not sure exactly how he achieved the
> color. When terms like cesium and lithium are used I no longer
> understand if this is in the pt/pd, or represents some other variant.
> What I did gather from Witho was that the use of these other metals
> requires an extremely delicate balance in the mixture.
>
> Is there a good write-up anywhere about these alternate possibilites
> with pt/pd?
>
> Sandy
>
>
>
>
>>Sandy,
>>
>>Gold can be included in the sensitizer (replacing some of the Pt/Pd drops)
>>and will indeed move the print color toward purples and split tones, either
>>with develop-out or POP methods. With POP, gold and other additives can
>>also shift color. Witho Worms has done some really interesting experiments
>>with split-toned results from POP-palladium prints. Pt/Pd prints can also be
>>gold toned after standard processing, again changing tone and color with
>>purples and various splits possible.---Carl
>>--
>> web site with picture galleries
>> and workshop information at:
>>
>> http://home.earthlink.net/~cweese/
>>
>>----------
>>>From: Sandy King <sanking@clemson.edu>
>>>To: alt-photo-process-l@sask.usask.ca
>>>Subject: Question about pt/pd
>>>Date: Tue, Dec 10, 2002, 3:47 PM
>>>
>>
>>> This is a question for the pt/pd folks.
>>>
>>> I was writing something about the characteristics of different
>>> processes and when I got to pt/pd it crossed my mind that I might
>>> better verify my information. I have always assumed that with pt/pd
>>> one is pretty much stuck with neutral black to warm black color,
>>> depending on the mixture of platinum to palladium. Is this true, or
>>> can the image color of pt/pd be changed? Could a pt/pd print, for
>>> example, be toned with gold to produce the purplish/bluish color we
>>> get with gold-toned silver processes?
>>>
>>> Sandy King
>>>
>
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