Are sure? 500ml sound fine, but 300?
Originally Posted by hrst
Yeah, I'm talking about rotary processing which is quite common among color processing hobbyists. There's at least two series of Jobo tanks; the smaller ones and the larger ones. The larger one that accepts 120 films (or two 135-36) needs 280 or 290 ml solution IIRC. We have always used 330 ml just to be sure. The smaller ones need even less. With less than 500 ml, our tank can make two 120 films (on different spools) or three 135-36 IIRC at the same time.
Originally Posted by Anon Ymous
AND, this can't be the issue since it says that 100 ASA 120 or even 220 films can be done 16 at a time per 5000 ml, and not 8.
To put the instructions again in another words, it says that you need 625 ml for one 120 roll but with the same amount (625 ml) you would make THREE 135-36 rolls. That won't make any sense even if we are talking about manually agitated tanks because even two 135-36 takes more solution than one 120.
I mailed Fuji if they could explain this .
I can process approx. 30+ rolls of 120 through a Fuji C-41 5 litre kit, one shot. (3 films per 470ml, say 480ml for safety. 480 x 10 = 4800ml)
Speculating even more ... Looking at the "Max No of rolls".
When looking at 135-36 films, the ratio between total number of 100-200 ASA and 400-1600 ASA is 96/72 = 1,33. So, 400-1600 ASA films would use the developer (and other solutions) 33% more quickly. Sounds about right.
Then, if we look at 120 films, the same ratio between 100-200 ASA and 400-1600 ASA becomes... 80/32 = 2,5!
This is just too silly .
Yeah. That sounds about right for one-shot. With Fuji's instruction, you could do maximum 32 when using dev time compensation, and max 8 when doing one-shot. I'm not actually worried whether this works or not; I'm SURE that it will work just as you have said, but this piece of paper that has some very original and interesting figures on it is bugging me .
Last edited by hrst; 09-27-2009 at 06:37 PM. Click to view previous post history.