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Re: Platinum/Palladium question
Why not simply rewarm the developer to put the chrystals back into solution?
Pot. Oxalate is pretty concentrated solution, it would be normal for some of
the material to fall out as the developer stands. This has happened to me a
few times, and a little warming up and stirring put the chrystals back into
solution.
Joe Portale
Tucson, AZ
----- Original Message -----
From: Jeffrey D. Mathias <jeffrey.d.mathias@worldnet.att.net>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Wednesday, April 25, 2001 12:26 PM
Subject: Re: Platinum/Palladium question
> Tori Nelson wrote:
> > ... I have some rather large crystals
> > that have formed in my developer, potassium oxalate, and I'm pretty
> > sure that I don't want them there....
>
> It is normal for these large crystals to eventually form in a used
> developer. Crystals may also form if the temperature is lowered enough.
>
> The only problem they might cause is scratching the print. A couple
> ways to get rid of them are:
> strain the solution (use plastic strainer)
> decant the solution (in bottle or tray)
>
> If the solution is really old (that means has processed many prints),
> consider replacing it. A really old solution may cause fogging of a
> print.
>
> --
> Jeffrey D. Mathias
> http://home.att.net/~jeffrey.d.mathias/