Datacolor User to User Support Group.

I subscribe to StudioPrint rip forum and a member tested drydown with Epson Ultrachrome/
Cone's Quadtone inks on PhotoRag.

If you have Excel, here's his findings:

http://d40.yousendit.com/F/2UZZ6UCIL4WGK2J8SG7K2N9ZME/Drydown_PhotoRag.xls

On the bottom of the window are tabs to change inkset results.

His findings suggest that 36 hours is needed for ink stabilization. Also Cyan takes the 
longest time to stabilize.

My question is with delta values: Is there a minimum delta value that is visible to us humans?