[rollei_list] Re: Planar 2.8 coverage
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Wed, 3 Oct 2007 05:20:07 -0700
----- Original Message -----
From: "ERoustom" <eroustom@xxxxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx>
Sent: Wednesday, October 03, 2007 5:05 AM
Subject: [rollei_list] Re: Planar 2.8 coverage
Thanks! This was my first roll in Rodinal, and since
Ilford's spec sheet gave one time, and Rodinal gave
another, I split the difference, so maybe not enough
time. and maybe back to 5 seconds every 10 minutes. I use
a stainless steel tank, agitating for the first 10
seconds of each minute. Ilftoec HC never gave me this
problem, but the grain is much much finer with Rodinal.
I wonder though about how tightly the camera is holding
the film. This is the same roll that gave me the strange
light leak across frames.
Thanks again all.
Elias
Curious about the grain. I've never used Ilfotec HC,
which is similar to Kodak HC-110 but would expect it to have
somewhat finer grain than Rodinal. I've used Rodinal mostly
for sheet film and have never had any problems with it but I
generally use finer grain developers in tanks. I think the
main thing with tanks is to have a long enough development
time to average out irregularities in agitation. However, if
there are surge effects in the tank they are likely to be
the same even if the time is increased. The most common
surge marks in inversion type tanks are increased
development at the edges of the film due to turbulent flow
in the interstices of the reels, and sprocket hole marks due
to turbulent flow through these holes, also causing a
localized increase in development.
If you find the problem _is_ due to surging I can only
suggest using a different type of reel or rotating the tank
along with inverting it. I was taught this trick long ago
and its become a habit.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
---
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