[pure-silver] Re: PSE CONFIRM KRST
- From: Eric Nelson <emanmb@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Sat, 1 Sep 2007 21:30:36 -0700 (PDT)
I used a Baxter pH test strip that has 4 colored
patches on it to match. Perhaps they are too old, eh?
Bah! Just tested one in water and got a pH of 5
again. Time to get some new ones! Haha joke's on me.
Eric
--- Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:
>
> ----- Original Message -----
> From: "Eric Nelson" <emanmb@xxxxxxxxx>
> To: <pure-silver@xxxxxxxxxxxxx>
> Sent: Saturday, September 01, 2007 9:41 AM
> Subject: [pure-silver] Re: PSE CONFIRM KRST
>
>
> > Just FYI re:fixer acidity; I recently tested my
> kodak
> > rapid fixer print bath #2 w/NO hardner added, and
> it
> > has a pH of 5.
> >
> > Whether this is due to carry over from stop bath
> or is
> > it's nature I'm not sure as it was a slightly used
> > bath.
> > Eric
> >
> That sounds too acid. The hardener has some
> Sulfuric
> acid in it which should lower the pH. By memory, the
> correct
> pH for the hardener to work is around 6.2 so the
> fixer
> without the addition of the hardener solution should
> be more
> alkaline than this. I also can't remember the exact
> pH of
> Acetic acid stop bath but generally fixers are quite
> well
> buffered so that carried over stop bath should not
> affect it
> too much. Something puzzling there.
> How did you make the pH measurement?
>
> ---
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
>
>
>
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