From: Witho Worms en Jorien van Santen (verzet13@xs4all.nl)
Date: 05/16/01-01:09:53 AM Z
You may check the pH of the oxalate solution. If it is to low you can use a
hydroxide (potassium) to bring the pH up to around 5 or 6. This will
dissolve it better. I had the same experience. Different grades of
potassiumoxalate can make a big difference (a former Harald Leban tip).
Witho
----- Original Message -----
From: "Eric Neilsen" <e.neilsen@worldnet.att.net>
To: <alt-photo-process-l@skyway.usask.ca>
Sent: Wednesday, May 16, 2001 4:08 AM
Subject: Re: Oxalate Potassium doesn't remain dissolved
> Another vendor may be the answer. Perhaps just make it up from scratch
> would work best and it is 1/8 the cost. I have made many gallons and have
> seen a small amount come back out as a precipitate. Jeffrey first
> suggestion of decanting would also be a great first step. Unless you are
> getting less than very good results, don't worry. 300 to 275 grams of Pot
> Ox in a liter should be just fine. I don't think that you'll see any
> change. It may give you a slightly slower print and a tiny amount of
extra
> contrast, but very slight on both accounts.
>
>
>
> Eric J. Neilsen
> 4101 Commerce Street, Suite #9
> Dallas, TX 75226
> 214-827-8301
> http://e.neilsen.home.att.net
> http://www.ericneilsenphotography.com
> ----- Original Message -----
> From: "Jeffrey D. Mathias" <jeffrey.d.mathias@worldnet.att.net>
> To: "alt-photo-process list" <alt-photo-process-l@usask.ca>
> Sent: Tuesday, May 15, 2001 5:24 AM
> Subject: Re: Oxalate Potassium doesn't remain dissolved
>
>
> > Philippe Ayral wrote:
> > > ... I try to know where is the
> > > problem before making a new batch and having the same problem.
> >
> > At this point, I do not know.
> > Clean everything. Check materials (water and PO), and perhaps even try
> > materials from another vendor.
> >
> > --
> > Jeffrey D. Mathias
> > http://home.att.net/~jeffrey.d.mathias/
>
>
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