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Photo Forum / Film Photography / Darkroom / March 2005b/w rotary processing - what works for you?
Hello all, just processed some APX-100 in Xtol using my Jobo processor and I should have become suspicious that the Xtol docs state 6.5 minutes as oppposed to 9.75 for small-tank processing. The negs are _very_ light. Any tried and tested developer/time combinations for APX-25, APX-100 and PAN-F in a Jobo? A note on the background of the exercise: I've been having spots on my negs, especially with slow films like APX-25 or Konica IR750 and I'd like to try rotary processing as a possible remedy. Ralf  SignatureRalf R. Radermacher - DL9KCG - Köln/Cologne, Germany private homepage: http://www.fotoralf.de manual cameras and photo galleries - updated Jan. 10, 2005 Contarex - Kiev 60 - Horizon 202 - P6 mount lenses > Hello all, > [quoted text clipped - 6 lines] > Any tried and tested developer/time combinations for APX-25, APX-100 and > PAN-F in a Jobo? Without pulling out my notes I think 15minutes for D-23 1:3. APX-100. 100ml of stock per roll of film. Or 400ml of 1:3. You might want to check the unblinkeye website. They had an article on rotary and developer timing. The general impression I got was to test test test. Some developers need shorter times. Some no change at all. Nick > Without pulling out my notes I think 15minutes for D-23 1:3. APX-100. > 100ml of stock per roll of film. Or 400ml of 1:3. Ooops. That might be real cause. I've processed four rollfilms in 470 ml Xtol 1:1. That's a mere 60 ml per roll. Ralf SignatureRalf R. Radermacher - DL9KCG - Köln/Cologne, Germany private homepage: http://www.fotoralf.de manual cameras and photo galleries - updated Jan. 10, 2005 Contarex - Kiev 60 - Horizon 202 - P6 mount lenses >> Without pulling out my notes I think 15minutes for D-23 1:3. APX-100. >> 100ml of stock per roll of film. Or 400ml of 1:3. > > Ooops. That might be real cause. I've processed four rollfilms in 470 ml > Xtol 1:1. That's a mere 60 ml per roll. I don't know the capacity for Xtol but ya you need to make sure you have enough developer. I guess you're using the 1500 tanks? The 2500 would need more then 470 to just fill the tank right. Nick > I guess you're using the 1500 tanks? Yup. And they simply won't hold the required amount of stock solution per film in rotary processing. Ralf SignatureRalf R. Radermacher - DL9KCG - Köln/Cologne, Germany private homepage: http://www.fotoralf.de manual cameras and photo galleries - updated Jan. 10, 2005 Contarex - Kiev 60 - Horizon 202 - P6 mount lenses I should be common knowledge that one can use the second or third "helping" of diluted developer to circumvent the smaller tanks' capacity. Instead of "dev-stop-fix" go "dev-dev-dev-stop-fix". With the longer development times it works. > Hello all, > [quoted text clipped - 18 lines] > manual cameras and photo galleries - updated Jan. 10, 2005 > Contarex - Kiev 60 - Horizon 202 - P6 mount lenses Rotary processing is not as good as hand processing using intermittent agitation. Ralf R. Radermacher a écrit : > Hello all, > [quoted text clipped - 12 lines] > > Ralf There is a bulletin from Jobo regarding Xtol: http://www.jobo-usa.com/bulletins/xtol.htm You should read, at the end, the chapter regarding APX100 where they recommend 200ml (instead of the classic 100ml) of stock solution to obtain proper density. Kodak Publication J-109 on Xtol: http://www.kodak.com/global/en/professional/support/techPubs/j109/j109.pdf Times are given for rotary agitation. I usually find them on the low-side but I use a diffusion enlarger. Regards, SignatureClaudio Bonavolta http://www.bonavolta.ch > There is a bulletin from Jobo regarding Xtol: > http://www.jobo-usa.com/bulletins/xtol.htm > You should read, at the end, the chapter regarding APX100 where they > recommend 200ml (instead of the classic 100ml) of stock solution to > obtain proper density. That explains it. So, there is no point in running APX100 with Xtol in a Jobo processor. The 1500 series tanks don't take the required quantity of stock solution per film and there is no economy in chemicals to be realised. Back to manual processing, then. No real trouble since I was rather aiming at using less chemicals. Loading and cleaning the processor is so much work that manual tank processing is by far the easier method. Still doesn't solve the problem with the spots I've been having on APX-25 and Konica IR750. They look as if there had been isolated air bubbles on the film during development. Never occured with faster film. Ralf SignatureRalf R. Radermacher - DL9KCG - Köln/Cologne, Germany private homepage: http://www.fotoralf.de manual cameras and photo galleries - updated Jan. 10, 2005 Contarex - Kiev 60 - Horizon 202 - P6 mount lenses |
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