Re: Clearing Pt/Pd prints

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From: JOHN A ROSEBOROUGH (JROSEBOROUGH@prodigy.net)
Date: 04/05/00-11:08:56 PM Z

Eric,
Please tell us how to make Potassium Oxalate. Not being a chemist,I would
think that its not that hard. Or can you give a reference that's simple and
easy to understand.

TIA,
John Roseborough
Pyro for hire.
-----Original Message-----
From: Eric Neilsen <e.neilsen@worldnet.att.net>
To: alt-photo-process-l@sask.usask.ca <alt-photo-process-l@sask.usask.ca>
Date: Wednesday, April 05, 2000 4:29 PM
Subject: Re: Clearing Pt/Pd prints

>"Jeffrey D. Mathias" wrote:
>
>> Study of the clearing of Pt/Pd prints <SNIP>
>
>>
>> S; Sodium Sulfide; 20 grams per 1000 ml water (2% solution)
>
>I believe you meant Sodium Sulfite! not Sulfide.
>
>As for the rest, good work. I would ask if you checked into the
possibility
>of adding Oxalic acid to the developer and to monitor the pH of your
develop
>to see what amount of Oxalic acid should or could be added to a Potassium
>Oxalate developer to help prevent the formation of compounds that might
lead
>to fogging rather than calling for fresh developer? And are you making or
>buying your potassium oxalate? Making it can save one many dollars as it
>cost about 1/8 the purchase price to make it and it is easy to add extra
>oxalic acid to your mix as it is one of the two components.
>
>Thanks for sharing
>
>
>EJ Neilsen
>--
>Eric J. Neilsen
>4101 Commerce Street, Suite #9
>Dallas, TX 75226
>214-827-8301
>http://e.neilsen.home.att.net
>http://www.ericneilsenphotography.com
>
>
>

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