From: Greg Schmitz (gws1@columbia.edu)
Date: 10/17/03-11:35:29 AM Z
On Fri, 17 Oct 2003, Ryuji Suzuki wrote:
>
> > There's a lot of B.S. about pH measurement out there and
> [...]
> > FWIW I already know how pH is measured and the theory behind it.
>
> Didn't you just say that you didn't know about a very well known
> problem with pH measuring probes? Very amusing.
Ryuji,
That's not what I said. What I said was, that in 25 years of use in a
production darkroom I've never had problems with a gel probe. I have
an assortment of probes, including some for near dry surface
measurements but they rarely see use because I don't have a need for
them a regular basis (or bases :*) What I am saying is CHOOSE THE
RIGHT TOOL for the job. The "most precise" or "ideal" tool is NOT
ALWAYS the right tool. I've been in more than a few labs (and not
just photographic) where the pH meter is just a dusty object in the
corner because it has not been maintained and is not ready to use
because of an electrode that requires maintenance due to infrequent
use.
-greg
----------
Arthur Schopenhauer once described talent as hitting a mark which
ordinary man cannot reach; genius as sighting a point which others
cannot even see.
Siegfried Giedion
MECHANIZATION TAKES COMMAND
1948
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