Road ruts with Jobo
The problem is with 120 roll film in the 2500 series drums, although I do not get even development when I process 8x10 film in the 300x series drums. On 1/21/04 4:25 PM, in article BC34587A wrote: 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 |
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. |
Road ruts with Jobo
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 www.creative-light.com tom (at) creative (dash) light (dot) com do NOT send email to (it's reserved for spammers) |
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. ;- |
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 |
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"? |
Road ruts with Jobo
|
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) |
Road ruts with Jobo
Michael Scarpitti wrote:
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. I used to develop 4x5 sheet film in Calumet stainless steel 1/2 gallon tanks in Kodak Stainless Steel hangers. During testing, I made uniform exposures to entire sheets and measured the densities across the films using my MacBeth TD-901 transmission densitometer. They were quite uniform. When I switched to the Jobo CPE-2 processor with the old reels (I forget their number), I had terrible uniformity problems. A broad denser stripe down the middle of the film parallel to the 5" edge was quite obvious: no densitometer was required. At the time Jobo suggested developping only 4 sheets in each 6-sheet reel, leaving more space between the negatives (or transparancies). Well that helped a lot, but even so, it was not entirely satisfactory. They redesigned the reels and now sell the 2509-N reels that work perfectly. In addition the the redesign of the reels, the reels now come with some plastic plates that are presumably to hold the films in place. I never had trouble with films coming out even with the old reels, but perhaps some people did. IMAO, thse retaining plates also greatly improve the flow patterns, making (hypothetical) rushing between the negatives less likely. So not stipes anymore. But this is old news, since the "new" reels were probably introduced at least a decade ago by now and I doubt anyone has the old type in stock. In any case, I find my control over processing is much easier with the Jobo processing than the manual processing I used to do. The repeatability is certainly much greater that formerly, since the agitation is always the same. -- .~. Jean-David Beyer Registered Linux User 85642. /V\ Registered Machine 73926. /( )\ Shrewsbury, New Jersey http://counter.li.org ^^-^^ 10:50pm up 17 days, 10:16, 2 users, load average: 2.08, 2.04, 2.07 |
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 |
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