Re: P/P and different developers

[Carl Weese <cweese@earthlink.net>]

Sandy,

In fact I tried a couple 12x20 kallis earlier this week with fresh potassium
oxalate. It appeared to work fine, but I encountered streaking problems
again, as I had with big prints before. A coating that appeared perfect, and
dried with a perfectly smooth surface, showed streaks and brush stroke marks
after exposure, before development. This did not happen with my small 5x7
tests, but has happened each time I've done bigger ones. I suspect that
kallitype wants a much lower humidity level than the 65% I find ideal for
Pt/Pd printing. Both Lenox and Stonehenge White show the problem. As for
smoothness in the areas unaffected by streaks, if anything the pot.ox.
developed print seems grittier than earlier ones in sodium citrate, so its
superiority may only be for Pt/Pd.

---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: P/P and different developers
>Date: Tue, May 7, 2002, 10:37 PM
>

> Carl,
>
> I wonder if you tried potassium oxalate with kallitype? It would be
> interesting if it also gives smoother tones and a less gritty look in
> kallitype than the sodium citrate developer I proposed. Somewhere I
> read that potassium oxalate was very tricky to use with kallitype and
> for that reason never tried it.
>
> Sandy
>
>
>
>>My two-cents worth is this: potassium oxalate gives simple and effective
>>relief to many of the problems people encounter with citrate developers.
>>Smoother tone with less tendency to go gritty, etc, etc. It's available from
>>the usual suppliers but you can make it up yourself from oxalic acid and
>>potassium hydroxide (lye) quite easily and cheaply. You need a source for
>>the oxalic acid in bulk at cheap prices, and it will entail a hazmat charge.
>>I've been pleased with the service from:
>>
>>http://chemistrystore.com/index.htm
>>
>>Many chemicals will effectively reduce a Pt/Pd print, but in my experience
>>nobody does it better than PotOx.
>>
>>---Carl
>>
>>--
>>         web site with picture galleries
>>         and workshop information at:
>>
>>         http://home.earthlink.net/~cweese/
>>
>>----------
>>>From: Wendy Gollihue <wgolli@flash.net>
>>>To: alt-photo-process-l@sask.usask.ca
>>>Subject: P/P and different developers
>>>Date: Tue, May 7, 2002, 5:57 PM
>>>
>>
>>>  I would like to 'ditto' Jonathon Russells question.
>>>
>>>  I didn't see an answer yet and would like to know also.
>>>  ....awaiting....
>>>
>>>  Wendy (TX)
>>>
>>>>>>>>Can someone enlighten me as to the difference between Ammonium Citrate
>>>  and
>>>  Sodium Citrate developers when it comes to Platinum/Palladium prints?<<<<<<
>>>
>>>>>>>Jonthon Russell
>>>
>
>
> --