I wrote up a pdf QTR tutorial that hopefully makes things clear for both simpler uses (canned curves) and more advanced setups. The tutorial is based on an UC K3 setup on a 3800, but the concepts apply to other quad configurations. The link is on my blog at <blogfiftygreatestphotos.com/2009/07/21/quadtone-rip-workflow>
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workflow tutorial
2009-07-21 by Amadou Diallo