Re: Pt./Pd. question acid pre-soak

From: Kerik ^lt;kerik@kerik.com>
Date: 08/09/05-12:12:06 PM Z
Message-id: <opsu856gp69xluie@mail.kerik.com>

Mark,

Interesting. I've seen similar effects. BTW, you can adjust the pH of your
Pot Ox by adding some oxalic acid. No need to throw it out in the future.
I try to keep the pH of my P.O. around 6.0.

Kerik

> Kerik,
>
> I would agree. I tried some FAEW and used an oxalic acid presoak with
> it.
> I got good prints, but switched back to COT 320 because I did not like
> having
> to do the presoak. Once I began printing with the COT 320 again, I
> noticed
> I was not getting as good as results as before and determined that the
> Potassium Oxalate that I was using had somehow changed drasticly when
> using the FAEW.
> My guess was that it had gone very alkaline and PH tests supported
> this.
> I threw out that batch of Potassium Oxalate and mixed fresh developer and
> experienced no further problems.
> Mark Nelson
Received on Tue Aug 9 12:11:06 2005

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