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
