[pure-silver] Re: Shoulder and highlight
- From: "jayers" <jayers@xxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Sat, 1 Jan 2005 12:26:51 -0800
Hi, I noticed in Phil Davis's article "A Library of Film Curve Families"
De, max News Letter vol. 9 issue 1&2 April 2002 available from
www.viewcamerastore.com
TMX has an apparent hump with Xtol. This might also indicate some roll
off of the shoulder. DDX developer exhibits this to a lesser degree, and
d-76 is straight at 4, 5.4, and 8 minutes and shows a slight hump at 11,
16 min.
Xtol produces the greatest development latitude closely followed by
D-76, DDX.
Jonathan
-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Bob Randall
Sent: Saturday, January 01, 2005 9:16 AM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: Shoulder and highlight
On 12/31/04 7:09 PM, "Ryuji Suzuki" <rs@xxxxxxxxxxxxxxx> wrote:
> In my hand neither T-MAX 100 nor 400 has hump in their curves. T-MAX
> P3200 can have it. I'm curious how you got hump in TMX or TMY if it's
> what you are talking about.
With regard to Xtol, when I was gathering data from my curves testing, I
thought I had made a mistake along the way, so I repeated the process
with
this developer. I got the same results after a second try. A significant
density build or hump starting in the lower midtone. I called Silvia
Zawadski (sp) and Dick, can't remember his last name. They developed
Xtol
for Kodak and are now consultants to Kodak as well as others. They
explained
the hump as a result of greater activity of the developer on film in the
midtone area. While the explanation was arcane and incomplete, they did
own
up to it. I did think from their explanation that the "hump" was
specific to
the developer and not the film. I've never seen it with any other
film/developer combo.
By the way, I scanned a bunch of the test film and was pleasantly
surprised
to find Tmax 400 the hands down winner so far. I shot test rolls of Tmax
400, Tmax 100, Fp4, PlusX and Delta 400. The subject was a woman from
England. She has very pale, translucent skin with blond hair. She was
wearing a black rayon pullover with tight weave and pants with a loud
grey/white texture. Studio strobe lighting with a polaroid exposure at
F11
on a RZ67. The main light was a Desisti fresnel strobe which was bare
and
pointed directly at her face from slightly camera right. Very hot light.
Bracketed all film around the indicated exposure and developed in Tmas
developer at 68 degrees using using Anchell's times. The Tmax 400
carries so
much workable tone it was wonderful. This is my first experience with
both
the film and developer. I want to try D76 and others. I'm looking for
even
greater highlight separation. Any suggestions? If any one wants to see
the
results, send your email address and I will forward the scan.
Bob Randall
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