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Road ruts with Jobo



 
 
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  #1  
Old January 24th 04, 01:20 AM
Michael Scarpitti
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Default Road ruts with Jobo

Brian Kosoff wrote in message ...
Hi,

I'm using a Jobo cpp-2 processor I am getting an uneveness in
development which jobo refers to as "road ruts" that is a linear uneveness
that runs the long length of the film, in the direction of the rotation.
It's dense on the edge, then lighter 1/3 of the way in, then denser, then
lighter then denser.
Jobo says to slow the speed of the rotation down from the 75 rpm that
the manual suggests, so I have slowed it to about 50rpm, but I am still
getting the ruts. My film is 120 tmax 100, the developer is d-76 1:1, I
am using a 5 minute presoak, 4 rinses after fix and kodak rapid fixer. No
stop bath. I shoot primarily very high key scenes and still lifes where
eveness of background is critical.

Any help with this problem would be greatly appreciated, thanks.

Brian Kosoff
kosoff.com




Mechanical agitation that is invarying inevitably will be harder to
control than manual agitation using inversion in a standard tank. The
allure of mechanization is obvious, but I process exclusively by hand,
and never have uneven development.
  #3  
Old January 24th 04, 03:06 AM
Brian Kosoff
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Default Road ruts with Jobo

I shoot large quantities of film, from 120 up to 8x10 doing it by hand would
be prohibitive. I bought a Jobo because supposedly, it was the most even
processing. What's funny is that most of the Jobo owners that I have spoken
to have similar problems with eveness. When I asked a Jobo tech, they told
me that I might need to turn my processor 90 degrees in relationship to the
earth's magentic field!!!! Now that's what I call customer service!


On 1/23/04 7:47 PM, in article
, "Tom Thackrey"
wrote:


On 23-Jan-2004, (Michael Scarpitti) wrote:

Mechanical agitation that is invarying inevitably will be harder to
control than manual agitation using inversion in a standard tank. The
allure of mechanization is obvious, but I process exclusively by hand,
and never have uneven development.


Gee and I thought consistancy was the objective. I didn't realize that
varying agitation was part of the creative process. ;-


  #4  
Old January 24th 04, 03:24 AM
jjs
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Default Road ruts with Jobo

In article , Brian Kosoff
wrote:

[...] When I asked a Jobo tech, they told
me that I might need to turn my processor 90 degrees in relationship to the
earth's magentic field!!!! [...]


Same as "Where the sun don't shine"?
  #5  
Old January 24th 04, 04:04 AM
Tom Thackrey
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Default Road ruts with Jobo



On 23-Jan-2004, Brian Kosoff wrote:

I shoot large quantities of film, from 120 up to 8x10 doing it by hand
would
be prohibitive. I bought a Jobo because supposedly, it was the most even
processing. What's funny is that most of the Jobo owners that I have
spoken
to have similar problems with eveness. When I asked a Jobo tech, they told
me that I might need to turn my processor 90 degrees in relationship to
the
earth's magentic field!!!! Now that's what I call customer service!


I guess (or is it gauss) I must have aligned mine correctly by accident.

I do 35mm, 120 and 4x5 in my Jobo 1500. I've probably done 400 rolls of
35mm, over a 1000 of 120 and several hundred sheets of 4x5, mostly B&W, some
E-6, and quite a bit of C-41 in the last two years. All of my problems have
been user induced. When I load the film and chemistry correctly and select
the right program and water temperature I get excellent results. I only know
a few Jobo owners, but all of them seem to like the results. I bought mine
because Rod Dresser was so happy with his. I'm also surprised at your
experience with Jobo support. I've never had to call them, but I've always
heard good things about their responsiveness and knowledge.

I'm not trying to suggest that you aren't having problems or that Jobo's
perfect. I'm just relating my experience.



--
Tom Thackrey
www.creative-light.com
tom (at) creative (dash) light (dot) com
do NOT send email to (it's reserved for spammers)
  #6  
Old January 24th 04, 04:59 AM
Jean-David Beyer
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Posts: n/a
Default Road ruts with Jobo

Brian Kosoff wrote:
I shoot large quantities of film, from 120 up to 8x10 doing it by
hand would be prohibitive. I bought a Jobo because supposedly, it
was the most even processing. What's funny is that most of the Jobo
owners that I have spoken to have similar problems with eveness. When
I asked a Jobo tech, they told me that I might need to turn my
processor 90 degrees in relationship to the earth's magentic
field!!!! Now that's what I call customer service!


Sounds more like someone with a sense of humor to me. I never have had
uniformity problems with the Jobo after getting the 2509N reels for 4x5.
I use the 2501 reels for 35mm (and I could use them for 120 or 220 if I
shot that size).


On 1/23/04 7:47 PM, in article
, "Tom Thackrey"
wrote:


On 23-Jan-2004, (Michael Scarpitti) wrote:


Mechanical agitation that is invarying inevitably will be harder
to control than manual agitation using inversion in a standard
tank. The allure of mechanization is obvious, but I process
exclusively by hand, and never have uneven development.


Gee and I thought consistancy was the objective. I didn't realize
that varying agitation was part of the creative process. ;-






--
.~. Jean-David Beyer Registered Linux User 85642.
/V\ Registered Machine 73926.
/( )\ Shrewsbury, New Jersey
http://counter.li.org
^^-^^ 10:55pm up 17 days, 10:21, 2 users, load average: 2.25, 2.16, 2.11

  #7  
Old January 24th 04, 03:08 AM
Randy Stewart
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Posts: n/a
Default Road ruts with Jobo


"Tom Thackrey" wrote in message
om...

On 23-Jan-2004, (Michael Scarpitti) wrote:

Mechanical agitation that is invarying inevitably will be harder to
control than manual agitation using inversion in a standard tank. The
allure of mechanization is obvious, but I process exclusively by hand,
and never have uneven development.


Gee and I thought consistancy was the objective. I didn't realize that
varying agitation was part of the creative process. ;-

--
Tom Thackrey


Gee Tom, I don't think that agistation methods, apart from some extremes,
have anything to do with "the creative process" either, but then mechanical
drum processing of your film doesn't guarantee "consistency" which is worth
achieving, as this thread as demonstrated.

Mr. Sccarpitti's style does get very far with me, so I find it stange to
take his side on this point. However the inherent problems of constant
agistation of the type provided by Jobo, or which I dealt with for more
than a decade using a similar processer, are well documented and discussed
in The Film Developing Cookbook. Hand done, intermitant agitation is not as
convenient as a drum processor, but it does avoid the problems discussed in
this thread, and should yield marginally better negatives for most people.
It's just a question of whether your drum processor result are okay for you
and you put a premium on the convenience, in which case, keep on "rolling".

Randy Stewart


  #9  
Old January 25th 04, 10:53 PM
Dan Quinn
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Posts: n/a
Default Road ruts with Jobo

(jjs) wrote

I never, ever agitate by hand or otherwise during film development.


Very funny. Dan
  #10  
Old January 24th 04, 05:03 AM
Jean-David Beyer
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Posts: n/a
Default Road ruts with Jobo

Randy Stewart wrote:
"Tom Thackrey" wrote in message
om...

On 23-Jan-2004, (Michael Scarpitti) wrote:


Mechanical agitation that is invarying inevitably will be harder to
control than manual agitation using inversion in a standard tank. The
allure of mechanization is obvious, but I process exclusively by hand,
and never have uneven development.


Gee and I thought consistancy was the objective. I didn't realize that
varying agitation was part of the creative process. ;-

--
Tom Thackrey



Gee Tom, I don't think that agistation methods, apart from some extremes,
have anything to do with "the creative process" either, but then mechanical
drum processing of your film doesn't guarantee "consistency" which is worth
achieving, as this thread as demonstrated.

Mr. Sccarpitti's style does get very far with me, so I find it stange to
take his side on this point. However the inherent problems of constant
agistation of the type provided by Jobo,


What _are_ the _inherent problems_ of constant agitation? AFAIK, the
only problem is the contrast is higher, and that is completely
controlled by decreasing the development time or increasing the dilution
of the developer.

or which I dealt with for more
than a decade using a similar processer, are well documented and discussed
in The Film Developing Cookbook.


Why do I _never_ get uniformity problems with my Jobo CPE-2? If I were
getting uniformity problems, surely I could measure them with the
TD-901, and I do not see that.

Hand done, intermitant agitation is not as
convenient as a drum processor, but it does avoid the problems discussed in
this thread, and should yield marginally better negatives for most people.
It's just a question of whether your drum processor result are okay for you
and you put a premium on the convenience, in which case, keep on "rolling".

Randy Stewart





--
.~. Jean-David Beyer Registered Linux User 85642.
/V\ Registered Machine 73926.
/( )\ Shrewsbury, New Jersey
http://counter.li.org
^^-^^ 11:00pm up 17 days, 10:26, 2 users, load average: 2.12, 2.21, 2.13

 




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