Archived posting to the Leica Users Group, 2001/11/20

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Subject: Re: [Leica] Acros Development Time/Process
From: Mark Rabiner <mark@markrabiner.com>
Date: Tue, 20 Nov 2001 12:11:35 -0800
References: <008201c171d1$6eefd700$0201a8c0@Workgroup>

Frank Filippone wrote:
> 
> A lot of testing was done for and by Kodak during the start of the TMax film
> effort.  Kodak wqould get good results, the consumer testers woulfd get
> lousy repeatability... Finally Kodak figured out consistent agitation and
> temp were the keys.  JOBO and John Sexton were brought in to figure out the
> right mix and methodoilogy to make Tmax films a success.  Sexton figured out
> and claims to have written the data sheet on developing TMax film.  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.
> 
> Frank Filippone
> red735i@earthlink.net
> 
> --
In a metal tank and metal Hewes reels http://www.hewes.co.uk/product.htm
with a quick presoak as i mix up my Xtol i get 16 minutes in Xtol 1:3 for the
Neopan Across 100 35mm film.

Quite a bit less time than my favorite film Neopan 1600 which gets 12 so this
across stuff is a different ballgame. I think it's the iodides, a tab grain deal.
My Neopan 400 gets 13 i think.
Some very nice 35mm looking negs and contact sheets I'll print this week.
I bought a brick of the stuff in 120 but not shot any of it yet.

I agitate once a minute by rolling the tank on my Wetsink back and forth gently
a few times.
	A piece of masking tape makes sure the rubber lid does not fall off.


Mark Rabiner
Portland, Oregon USA
http://www.markrabiner.com
mark@markrabiner.com
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In reply to: Message from "Frank Filippone" <red735i@earthlink.net> (RE: [Leica] Acros Development Time/Process)