Archived posting to the Leica Users Group, 2001/05/25

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Subject: Re: [Leica] JOBO Processors
From: John Hicks <jbh@magicnet.net>
Date: Sat, 26 May 2001 00:12:01 -0400

At 08:10 AM 5/25/01 -0700, you wrote:

>How do those of you who use the JOBO compensate for the different
>agitation of the processor vs using a small tank with manual
>agitation?

  I just went through a process to determine just that.
  My goal was to find development times for the Jobo that would provide
curve matches for what I had with intermittent inversion agitation. The
developer used with D-76H 1:1 and 1:3. I used a one-minute prerinse to
avoid airbells.
  The results show that there is _no_ standard compensation factor that can
be applied.
  To be specific, HP5+ in both D-76H 1:1 and 1:3 required a 25% reduction
in development time, Delta 100 in both D-76H 1:1 and 1:3 required a 35%
reduction, and Delta 3200 in DD-X 1:4 required only a 15% reduction.

John Hicks

jbh@magicnet.net

Replies: Reply from John Hicks <jbh@magicnet.net> (Re: [Leica] JOBO Processors)
Reply from Mark Rabiner <mark@rabiner.cncoffice.com> (Re: [Leica] JOBO Processors)