Archived posting to the Leica Users Group, 2001/11/21

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Subject: Re: [Leica] Acros Development Time/Process
From: Rolfe Tessem <rolfe@ldp.com>
Date: Wed, 21 Nov 2001 10:09:39 -0500
References: <200111210227.SAA06940@mejac.palo-alto.ca.us>

> 
> 
> Date: Tue, 20 Nov 2001 21:26:58 +0100
> From: Nathan Wajsman <wajsman@webshuttle.ch>
> Subject: Re: [Leica] Acros Development Time/Process
> Message-ID: <3BFABC92.4ED9C39D@webshuttle.ch>
> References: <008201c171d1$6eefd700$0201a8c0@Workgroup>
> 
> Frank Filippone wrote about TMax:
> 
> >  It
> > requires a 5 minute presoak in a JOBO to get things right..  The message her
> > is that presoak is required in certain processes.... the magic word
> > processes includes a specific film, developer, and methodology.
> 
> But not if you are using XTOL. Jobo recommends against presoaking with XTOL.
> 
> Nathan

This is not accurate.

JOBO doesn't *recommend* no presoak with XTOL, they just say it is
unnecessary since Kodak did extensive testing in rotary processors prior
to XTOL's introduction and published the times without presoak.

The reason JOBO recommends a 5-minute presoak normally is that it brings
the rotary processing times almost exactly in line with those published
for inversion processing in small tanks. Otherwise, the rotary times
would be about 15% less due to the constant agitation.

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Rolfe Tessem	|	Lucky Duck Productions, Inc.
rolfe@ldp.com	|	96 Morton Street
(212) 463-0029	|	New York, NY 10014
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Replies: Reply from Nathan Wajsman <wajsman@webshuttle.ch> (Re: [Leica] Acros Development Time/Process)