Thanks John,
I sent Steve a PM.
Thanks John,
I sent Steve a PM.
Mike,
Last January I had serious problems with 8*10 and Pyrocat-HD ina print drum. I eventually solved it by switching to a Paterson Orbital. I do not know if that is an option for you, but you might want to read about it here:
http://www.largeformatphotography.in...ht=cor+orbital
Best,
Cor
Hi Cor,
Have you used the Paterson Orbital with other agitation schemes like minimal agitation? I'd be really curious to hear the results. Thanks for that info.
Mike
Hi Mike,
I am not sure if an Orbital is the right device for semi-stand since it's bottom is curved, I think it is meant for continuous agitation. I use a lab shaker for that.
I have only varied the rotation speed, and I have used a relative large volume (300 ml) of developer.
good luck,
cor
Hugo,
I have also seen this phenomenon with Jobo tanks. I only fill 3 of the 5 slots in my 3005 tank and 3 of 4 in my Jobo 3004 tanks and have not had any issues as long as I pour the developer in on the side where there is no film loaded. I use pyrocat-hd all the time and do pt/pd printing. I also have no darkroom.
Diane
Diane, BTW which dilution do you use to develop your films in Pyrocat HD for pt/pd? 2+2+100?
"I believe there is nothing more disturbing than a sharp image of a fuzzy concept!" (Ansel Adams)
https://philippe.grunchec-photographe.over-blog.com/
Hi Mikew,
I had some problems with evenness processing 8x10 (FP4) in a tray using pyrocat-HD, 1:1:100. I finally went to 3 liters of working solution in an 11x14 tray and have had no problems. I don't think it was a matter of exhausting the developer when I was using 1.5 or 2 liters but that the film was just spending too much time tipped out of the developer when I was pulling a sheet out from the bottom to agitate. With 3 liters the top sheet in the stack is still well under the solution. I do 4-8 sheets (DBI) at a time. Presoak in water for two shuffles, transfer the entire stack to the developer, do two shuffles then wait 30 seconds between shuffles. Start looking at 7 minutes. No problems now, even with open skies. I do not rotate the stack. Times are 7 to 20 minutes at 70 degrees. Print on Azo or Lodima.
Henry
Hi Henry. I had the same issue with using too little developer. But the real problem that I've had with tray development - other than unevenness with minimal agitation - is how sensitive the emulsion is before it's hardened "enough." It seems like my film (FP4) is really easily marked during that first 2min of development -- in particular from any pressing down of the film motions. It's not so much a big deal with 4x5 because the format is easier to handle but I've found that it's a challenge with 8x10. I think I may be handling the film too much however.
Thanks Henry.
Bookmarks