Response to Switching from tray to drum developing

First off let me say hooray that you're using the Unicolr drums. There are a lot of people out there doing rotary processing but few of us still use the Unicolor drums. You've already got some great answers to your question and all I can add is to re-iterate the use of a more dilute developer to control the contrast. You diddnt mention the type of film you are using so I cant give any specific recomentdations but I can tell you that I use T-max 100 and I use t-max RS at a 1:9 dilution @ 75 deg F. for 11 min for an N process. This combo, other than the time, is pretty common and has been popularized by John Sexton. (that doesnt make it good or bad but it does give some starting points). A word of warning, the rotary agitation of a JOBO unit is NOT the same as that of our Unicolors! Dev times that people use for their JOBOs will usually not be similar enough to those of people with Unicolor drums to simply adopt without testing. In my experience the JOBOs are more vigorous even at the lowest setting that are the Unicolors. It almost seems like the Unicolor is halfway between tray processing and the JOBO rotary. Hope this helps!

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