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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. |
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