Hi Shel, Aaron, Thanks for your comments. I don't generally use either Ilfosol-s or Plus-x anymore, and I haven't shot a 24 exposure B&W roll of film for several years. I was just thinking of my own past experience. It really could have been developer exhaustion...
I did dig up the reference that I remember reading, Fred Picker in his "Zone VI Workshop" says when testing for "individual" film speed, after making a 5 exposures at the beginning of the roll (part of his test) to "expose the rest of the roll to zone V or take pictures. Developer action would be greater than normal if a given quantity of developer had only a few exposed frames to work on." Well, maybe that's the rub. 5 frames is quite a bit different than 24-30. So I guess I was worrying about something that I didn't need to worry about. But you have made a good point about possible developer exhaustion in a small tank. I'll pay attention to that from now on. Thanks guys, William in Utah. Shel Belinkoff wrote: > > Good morning! > > That's a good point, Aaron. I've been using more than the minimum > amount of developer solution for so long that I don't even think about. > For example, a single-reel Jobo tank uses 250ml of solution to cover the > film, but the tank will actually hold quite a bit more, I use 400ml of > solution. The two reel Jobo tank will use 485ml (465ml?) of solution to > cover two rolls of film, but I use 650- 700ml. There are also times > when using very dilute solutions, such as Rodinal at 1:100, where I'll > develop one roll in a two-reel tank, using 600ml of solution. > > Aaron Reynolds wrote: > > > > I'm not Shel, but it sounds like you're exhausting the developer with > > longer rolls in the tank. I would suggest perhaps using more developer > > per roll, and going with the correct time for the 'hotter' development > > you get with 24 exposure rolls, and then compare that to the results you > > get with the longer time. My guess is that you'll find the film > > developed for a shorter period with more developer in the tank will have > > finer grain. > > -- > Shel Belinkoff > mailto:[EMAIL PROTECTED] > http://home.earthlink.net/~belinkoff/ > "If you are a bad technician, it doesn't > matter how big your negs are." - PDML member > - > This message is from the Pentax-Discuss Mail List. To unsubscribe, > go to http://www.pdml.net and follow the directions. Don't forget to > visit the Pentax Users' Gallery at http://pug.komkon.org . - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
