Digital BW, The Print

> I wonder if that inkset is mixed correctly.  I found an old Eb6 calibration print for Epson Hot Press, and at 35% the LC Lab L = 39, the LM Lab L = 51.

Thanks for those values. I now believe I have found the problem.  I just printed a '100% Calibration' sheet of my EB6 inkset for Epson Hot Press.  At 35%, my LC Lab L=63.  Way off!  LM @35% is L=59.6.  I think your suspicion was correct.  My LC mix is off.  What seems to agree with that hypothesis is that the LC ink is the warmest.  Warmer even than the Magenta ink.  the LC @35% has a LAB B value of 6.7. My LM @35 has a LAB B value of 4.  Huge difference!  I actually dont need a spectrophotometer to see this.  The LC patches look distinctly brown compared to the more neutral appearance of the LM pathces.  To compare to the Magenta warmth I used the 10% patch because it has the closest Lab L value.  For 10% M the Lab B value is 5.7.  
All of this is very telling of what might have happened.  I believe that my 4oz LC bottle was filled from an LC reservoir that was not mixed frequently enough to counter the settlement of the carbon particles.  This would explain both the low density and the high warmth of my sample.  The larger/heavier carbon particles settle at a higher rate thus leaving the smaller (and warmer) particles on top.  
wow..all this is starting to remind me of my days as a physics undergrad working with centrifuges and carbon nanotubes...