[pure-silver] Re: Film processing problem
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Sun, 16 Sep 2012 22:11:01 -0700
----- Original Message -----
From: "Michael Healy" <fourbyfiveguy@xxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Sunday, September 16, 2012 6:43 PM
Subject: [pure-silver] Film processing problem
One of my students is getting problem results that have me
pretty confounded.
She's a new student. Got her first roll processed by the
lab (a real one, not a Wal-Mart). They use dip & dunk, and
(I think) replenisher T-max. She did the second one
herself yesterday in HC-110 (E). Both are 35mm. One was
FP4, the other HP5.
Both rolls show these periodic black strips from edge to
edge. The light leak type. Most are just inside one edge
of the image, and I think every one is on the same side of
the image. These have soft edges, not hard lines. Each is
the same width, about 1/4 inch. The first roll had a bunch
of them - a roll of 24 shots with about 6-7 of these black
bars. The second roll had only one, I think. Given
different films and processing, it doesn't sound like a
processing or loading problem. I'm inclined to think it
must be the camera. She says she did not open the back
except to load and unload. She was thinking it might have
to do with changing lenses (she was using two
interchangeably). That didn't make sense to me, though -
especially because she did deliberately change the lenses
a couple of times on the 2nd roll, trying to replicate the
problem.
I've had my share of light leaks but I don't ever recall
seeing anything like this. Well, actually I did, on my
ancient 8x10, which doesn't always press hard enough to
seal the loading side after I pull out the darkslide. The
effect on hers is similar, though more defined and
contained, like a crack of light instead of a seeping
leak. I've googled for this, but all I get are the 85
blogsters lecturing me on the 5 things we learned to
recognize in Photo 101 back in The Day. So I'm really
perplexed. Anyone have experience of what I've described?
Mike Healy
I did not read this carefully enough at first and did
not realize the fogged lines go from edge to edge of the
film. That is not the shutter. On a single roll of 35mm
film I would suspect the light trap in the cassette but if
two separate rolls this is unlikely. However, a couple of
questions:
Are these factory loads or bulk loads?
If bulk loads is there anything in common in their loading,
for instance could both rolls have been in the same
cassette?
Again, it would be helpful to know what kind of camera
was used and, again, I suggest examining the camera to see
if there is some sort of light leak.
--
Richard Knoppow
Los Angeles
WB6KBL
dickburk@xxxxxxxxxxxxx
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