From: Amy Cutting (amos1979@attbi.com)
Date: 01/31/03-08:16:21 PM Z
I'm by no means a film chemist but I was just wondering what would happen to
the film if you went back and forth between the thickened developer and a
water bath to clear/clean off the used developer and then reimmerse into the
fresh developer like some people do with paper developer and Amidol? Just
wondering. Amy
----- Original Message -----
From: "Ryuji Suzuki" <RSuzuki@MIT.EDU>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Wednesday, January 29, 2003 6:03 PM
Subject: Re: Acros Films
> From: Scott Wainer <smwbmp@starpower.net>
> Subject: Re: Acros Films
> Date: Wed, 29 Jan 2003 18:31:36 -0500
>
> > I tend to enlarge 35mm negs from
> > 8x10 to 16x20 (or even 20x24) and, for me, Pyrocat can't be beat (yet?)
in
> > the "visual" areas. I fully agree with you where LF (4x5) is concerned;
> > primarily because of the degree of enlargement.
>
> I use mostly 6cm, but I also use 35mm occasionally. In all formats, I
> love rangefinder cameras and rarely use SLR. Also, my workhorse Mamiya
> 6 has only 3 lenses available, I often have to make tight crop. This
> is even more true with original Konica Hexar (35mm f/2.0). I routinely
> blow these up to 11x14 and I don't want to see grain unless I use it
> for some effect.
>
> > As for ascorbate film developers, I tend to lump them with the PQ/MQ
> > developers.
>
> However, the chemistry of hydroquinone and ascorbate is very different.
>
> > The "thickened" developer sounds interesting; I haven't heard of it
before.
> > Could it be used with a developer like Pyrocat? I might like to try it
with
> > 4x5 film using the dip-n-dunk method. How would the developer react to
> > gelatin or gum arabic as the thickening agent (I don't have any
> > methylcellulose handy)?
>
> I suppose it can be done with pyrocat, but I did not try it. I suggest
> you use a good replenishing developer because one shot use is VERY
> wasteful with this approach. Replenishing developers are not as
> inconsistent as some books (and many people) talk about, if used
> wisely. (Indeed, it's very consistent in my experience.)
>
> I wouldn't use gelatin. If removal is not complete and you realize
> after drying, you are in trouble. Methylcellulose works well. (It's
> used as athickening agent in some shampoo, etc.)
>
> Ryuji
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