Digital BW, The Print

I noticed something important this weekend as I was working to tweak  
some QTR profiles.

I was comparing tones from old patches to some that were freshly out  
of the printer and finding some hard to explain differences.

In trying to figure out what was going on I got out a patch from the  
night before and they were much darker.

Basically I noticed that the 100% patch of Museum Black on Photo Rag  
takes at least 2-3 hours to dry down to its end density.

Patches that read 1.53 five minutes out of the printer read 1.58  
after an hour and 1.63 after drying over night.

This could certainly account for some challenges I have had in the  
past getting smooth ramps.

This is definitely going to change my calibration technique.

James