Some Great Ideas!, By putting the film in a loop with half in and half out, I could probably halve the abount of developer required. I'm envisioning some rollers covered in a soft foam, just above the level of the developer, with a crank handle sticking out the side of the trough, no, a barbecue rotisserie motor or something, and a light tight lid, and a fill and drain so I don't have to open it up until I'm done. Doesn't even sound that hard to make. Probably out of plexiglass or other plastic as suggested earlier. My only fuzzy area is the rollers. Do you think the film going around the rollers is likely to cause it any harm?
Gene Misha wrote: > > I think it might profit you to look at Ansel Adams's notes in "The Print" about > how he developed large mural-sized sheets of paper. If I recall correctly, he > used large custom-made troughs with diluted developer and rolled and re-rolled > the paper to provide constant "agitation". So long as the developer volume is > sufficient to develop your square footage, you should be okay. > > I also recall reading some time ago a medium-format photographer developed his > 120 film in trays to get even non-streaked skies. I laid the film on its side > after taping the two ends together with the tape from the backing paper, to form > a loop. He had figured out his agitation scheme and it worked out quite well for > him. I supposed if you had a tray or trough deep enough, you could "snake" the > film through the length of the trough and wiggle the thing periodically for > agitation. Dilute well so as to get long developing time and you've got it made. > > You could do snip tests by cutting off small pieces and taping them into 4x5 > film holders; expose for Zone I and find film speed; expose for Zone VII and get > developing time in your chosen developer dilution. I recall from "The Negative" > that using diluted developer he'd often develop once every minute or so, but > there's no reason not to agitate more frequently if it works out for you. The > dilution and extended development time is to hedge your bets for the time it > takes to wrestle all that film gently from the developer to the water or stop > bath. > > Hope this helps. > > Regards to all, > > --Michael Hendrickson > [EMAIL PROTECTED] > > _______________________________________________ > Cameramakers mailing list > [EMAIL PROTECTED] > http://rmp.opusis.com/mailman/listinfo/cameramakers _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
