For those who've actually done the sensitometry on their jobo process...I'd like to see some of these in control jobo control strips of yours printed next to their reference strip for the sake of comparison. No one making the claim to in control process in rotary has been able to come forward with conclusive evidence of their in control process. Of course the c-41 process is remarkably forgiving and you can still get good, printable results with an out of control process. But if it's not in control then you're not getting the full fidelity of the film. I suspect that this is what people are experiencing with their jobo process.
For my money, c-41 5x7 is just too dear not to have it processed in a well-tuned, in control refrema machine. As much as I'd like to believe in the myth of rotary processing being just as good if not better than dip n dunk, common sense and experience tell me otherwise. Do you really think your .6 litres of chemistry sloshing around like mad in that little tank that you're attempting to keep at a steady 37.8 degrees c. (+/- .15 degree c.) is going to give you the same results as a 110 litre bath with a nitrogen feed? Do you think that just because your water bath is holding steady that the actual, real-time temp of your tiny .6 litre bath is holding at 37.8 degrees c.? Have you ever tried measuring the temp. of your solution during the jobo process to see what's really going on with your tiny amounts of chemistry?
BTW, I agree with you, the labs in Boston suck. I used to work at F and D in Cambridge sq. when I was in my teens back in the late eighties / early nineties. Come to think of it, the labs in Boston sucked back then too.
Last edited by frotog; 09-27-2012 at 04:56 AM. Click to view previous post history.