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Photo Forum / Film Photography / Darkroom / November 2004Push Fortepan 400?
Just had to push a roll of Fortepan 400, any recommendations on dev and times for this without getting excessive grain, will use Rodinal if I must but would prefer X-tol or D-76. > Just had to push a roll of Fortepan 400, any recommendations on dev > and times for this without getting excessive grain, will use Rodinal > if I must but would prefer X-tol or D-76. XTOL is reported to be one of the best developers available for increasing film speed without excessive extra grain. The Massive Dev Chart at www.digitaltruth.com recommends 12.5 minutes with XTOL 1:1 for EI 400 (this is for 35 mm, but shouldn't vary much for 120, if you're using that size). While they don't have a recommendation for higher EI, in general you can push cubic grain films like Fortepan one stop by increasing development time 40-50%; that would put you around 18 minutes in 1:1, still at 68F with normal agitation. Another fine option, if you can get it, would be to develop in Diafine; that should support an EI of 640 to 800 without a great increase in grain, and maintain approximately normal contrast (certainly no more increase than would occur with a conventional push to 800). Diafine is easy and quick to use -- three minutes in Bath A, with gentle agitation every minute, and then (without stop or rinse) three minutes in Bath B with minimal agitation (I've found 5 inversions after filling, and one at each minute after that works very well), then water stop and fix normally. As a bonus, the Diafine working solutions last approximately forever -- because Bath A isn't alkaline, the developing agent isn't prone to oxidation as it would be in single bath developers. Some users replenish by replacing lost volume of the A bath with fresh solution, while pouring off and replacing the same quantity of B bath; others just use the same solution as long as it will cover the film, then discard and replace both baths. Seems to work fine either way.  SignatureI may be a scwewy wabbit, but I'm not going to Alcatwaz! -- E. J. Fudd, 1954 Donald Qualls, aka The Silent Observer Lathe Building Pages http://silent1.home.netcom.com/HomebuiltLathe.htm Speedway 7x12 Lathe Pages http://silent1.home.netcom.com/my7x12.htm Opinions expressed are my own -- take them for what they're worth and don't expect them to be perfect. > Just had to push a roll of Fortepan 400, any recommendations on dev > and times for this without getting excessive grain, will use Rodinal > if I must but would prefer X-tol or D-76. You cannot push any film. It doesn't work. > > Just had to push a roll of Fortepan 400, any recommendations on dev > > and times for this without getting excessive grain, will use Rodinal > > if I must but would prefer X-tol or D-76. > > You cannot push any film. It doesn't work. What do you think why about all manufacturers of black and white films and chemicals give times for push-processing? Not to forget the well adopted use of tailoring the CI of film to the subject brightness range as done in the zone-system (http://dizzy.library.arizona.edu/branches/ccp/education/guides/aaguide/zonesys.htm). Maybe a conspiracy? >>>Just had to push a roll of Fortepan 400, any recommendations on dev >>>and times for this without getting excessive grain, will use Rodinal [quoted text clipped - 10 lines] > > Maybe a conspiracy? Stefan, just ignore Uranium Committee -- he rants on and on with the same old "you can't" and "that's no good" messages, and all he's after is attention. He's what the Usenet community calls a "troll". SignatureThe challenge to the photographer is to command the medium, to use whatever current equipment and technology furthers his creative objectives, without sacrificing the ability to make his own decisions. -- Ansel Adams Donald Qualls, aka The Silent Observer http://silent1.home.netcom.com Opinions expressed are my own -- take them for what they're worth and don't expect them to be perfect. >Stefan, just ignore Uranium Committee -- he rants on and on with the >same old "you can't" and "that's no good" messages, and all he's after >is attention. He's what the Usenet community calls a "troll". I haven't followed the group for several months - is he by any chance the troll formerly known as Michael Scarpitti? >>Stefan, just ignore Uranium Committee -- he rants on and on with the >>same old "you can't" and "that's no good" messages, and all he's after >>is attention. He's what the Usenet community calls a "troll". > > I haven't followed the group for several months - is he by any chance > the troll formerly known as Michael Scarpitti? Apparently so. SignatureThe challenge to the photographer is to command the medium, to use whatever current equipment and technology furthers his creative objectives, without sacrificing the ability to make his own decisions. -- Ansel Adams Donald Qualls, aka The Silent Observer http://silent1.home.netcom.com Opinions expressed are my own -- take them for what they're worth and don't expect them to be perfect. > >>Stefan, just ignore Uranium Committee -- he rants on and on with the > >>same old "you can't" and "that's no good" messages, and all he's after [quoted text clipped - 4 lines] > > Apparently so. Yes, I am the collection of cells (haploid and diploid) formerly known as M i c h a e l S c a r p i t t i. > > > Just had to push a roll of Fortepan 400, any recommendations on dev > > > and times for this without getting excessive grain, will use Rodinal [quoted text clipped - 7 lines] > Not to forget the well adopted use of tailoring the CI of film to the > subject brightness range as done in the zone-system (http://dizzy.library.arizona.edu/branches/ccp/education/guides/aaguide/zone sys.htm). > Maybe a conspiracy? I'm not going to say "can't"--however--pushing and pulling film to adjust EI is more of a rescue than a process to be implemented everyday. You will not get any but a very small increase in true film speed but it can be useful for some applications and can actually create a great look for available light work. Zonies adjust development times to adjust contrast to fit a specific brightness range and not to change film speeds, they do modify their exposures as well but for "tonal value placement" and never to push or pull as the non-zone group defines the term. And, I've said before, film companies inflate their results, to sell more film. And what works (for them) in a carefully composed scene with a short contrast range, may not work when someone has to pull a miracle out of their hat to save a bad situation. Signaturedarkroommike > > > Just had to push a roll of Fortepan 400, any recommendations on dev > > > and times for this without getting excessive grain, will use Rodinal [quoted text clipped - 4 lines] > What do you think why about all manufacturers of black and white films > and chemicals give times for push-processing? OK, you can push film, but it doesn't do any good. |
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