Archived posting to the Leica Users Group, 2001/12/22

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Subject: RE: [Leica] compensating agitation tricks
From: Tom Finnegan <TomF@piengr.com>
Date: Sat, 22 Dec 2001 08:48:07 -0800

I believe the minimal agitation technique is also discussed a bit in
the'Film Development Cookbook'. I think they suggest trying agitation for
the first minute, then a few gentle inversions every 3 minutes. This usually
goes along with using dilute developer (xtol 1:3, rodinal 1:100...) as you
wouldn't want to do this with a short development time. Development times
will be a bit longer than 'normal' with this agitation scheme, so they
suggest I think starting off by adding 50% to the 'normal' time.

I tend to do something along the lines of what Gilbert and Johnny have
described. I use fairly 'normal agitation for the first 3-7 minutes, then go
to 2 or 3 minute intervals for the rest of the development. The potential
problem with going to long intervals after just the first minute, is you run
a higher risk of airbells or other development irregularities, at least in
my experience.

Tom Finnegan
Seattle

on 12/22/01 10:02 AM, Eric at ericm@pobox.com wrote:

> Like what?  You can't offer a tidbet like that and leave us hanging.  What
> have you been trying and with what results?  :)

Example: I run HP5+ in Xtol 1:3 for 16 minutes @70 deg. F. I agitate for the
1st 30 seconds, give it 4 inversions on the minute through 11 minutes; but
then I go 90 seconds to minute 12:30, 90 seconds to minute 14:00, and then
let it stand to 16:00. The highlights don't blow out, but the shadows keep
developing.

Special thanks to John "Johnny Deadman" Brownlow for this technique.

Gilbert

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