Hi William, My big concern here is the surface of the rollers, I don't want any damage to the film as it is going around. I had originally envisaged some kind of foam covering, but I dont know what foam would handle long term exposure to the chemicals. I could go with very smooth pvc rollers, but then I'm worried about film damage again. What do you guys think. By the way, that roll of Plus x Aero went for about $250.00 for the 1000 ft. Not too bad I guess, but more than I can spend right now. For now I want to try out some of this Aerial Reproducing film I have. Haven't even tried to figure out the speed yet. Kodak does rate it's high contrast resolution at 800 lp/mm though! I should make a thumbnail sketch of my notion of a rotating continuous loop developing tank, and send it along for comment, you interested? How about Sid?
Gene William Nettles wrote: > > 1. Jobo machines rotate at about 25 rpm. I designed my reel processor with a > WW Grainger 28rpm reversing gear motor. I get fairly even development. > Rotation speed was a big concern when I began rolling processing. So I too > can recommend 20-30 rpm. > > 2. With PMK pyro developer (which I really like) Gordon Hutchings recommends > using EDTA for tank processing when there's a lot of air in the tank-as with > JOBO. It's cheap, easy to use and has no bad effect. > > How is the film on the Navy/Airforce tank wound? Is on a stainless steel > reel as in a 35mm processing tank? > > OFF TOPIC > btw Sid, Congratulations on subduing Matagorda Island in the Gulf of > Mexico.<wink> I flew over them a few years ago and could see no enemy > activity--or bomb craters. > Did you notice in the images that the southern ends of almost all the > islands in the Gulf of Mexico are flat? This is caused by faults tranverse > to the main fault in the center of the Gulf. This fualt is in line with the > San Andreas Fault in Alta California. > Will > > ---William Nettles > > [EMAIL PROTECTED] > Nettles Photo / Imaging Site http://www.wgn.net/~nettles > > > From: [EMAIL PROTECTED] > > Reply-To: [EMAIL PROTECTED] > > Date: Sat, 27 Oct 2001 10:37:01 -0600 > > To: [EMAIL PROTECTED] > > Subject: Cameramakers digest, Vol 1 #242 - 10 msgs > > > > I would guess that it would have been about 20-30 rpm tops. by the time > > you were at the end of a 100' roll of 9" wide film, you had a bit of > > inertia to contend with which to... > > I never had the ends tear off the clips from the deceleration at the > > end reverse points. Just let the electric motor drive do its thing, dump > > solutions on time schedule, take it out of the wash and run it through a > > continuous dryer and run 'em over to Photointerpreting. Next day we'd > > make contact prints of the selected negatives. These were B-47 practise > > bombing missions over Matagorda Island in the Gulf of Mexico. > > bye, sid. > > _______________________________________________ > Cameramakers mailing list > [EMAIL PROTECTED] > http://rmp.opusis.com/mailman/listinfo/cameramakers _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
