[rollei_list] Re: Subject: A film developing experience
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Tue, 15 Jun 2010 14:44:04 -0700
----- Original Message -----
From: "CarlosMFreaza" <cmfreaza@xxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx>
Sent: Tuesday, June 15, 2010 2:30 PM
Subject: [rollei_list] Re: Subject: A film developing
experience
Hi Jan:
It happened to me with the first roll I took
with the
Contax II, now it's a film for "training".
I had my doubts about the Rodinal condition from a rational
point of
view, however I was so sure it would work that I did not
consider the
previous tests Richard suggested. The foam volume produced
during the
developer working indicates it was not in good condition,
there were
no errors or confusions about chemicals and the like.
The magazine looks in perfect working condition and the
shutter fires
for every shutter speed according you expect from it. Film
insert and
magazine have identical serial numbers (this is a
significant issue
too) and each step to load and unload film, to advance the
film, the
film feeler sensors, the film knob, the film counter are
working
according the manual descriptions and even the "foolproof"
mechanismis
are activated if something is wrong (f.e if you try to
release the
shutter with the magazine slide covering the film or if you
try to
take the magazine off without the magazine slide in
position).
Anyway I'm using a new roll right now and I'll see the
results.-
Carlos
Rodinal may indeed have a very long shelf life but it
oxidizes like any developer. If the volume of the remaining
concentrate is small it means the surface area is large
compared to the volume so it will oxidize faster. usually,
when a developer turns brown it indicates oxidation. Some
developers are somewhat yellow or brown even when fresh,
Rodinal and Dektol are examples, but, if the color is dark
enough it indicates the developing agent has oxidized and
activity is reduced or absent.
I am not sure what causes the foam but it has to be a
bad sign.
--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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