Digital BW, The Print

This question is perhaps best answered by Paul, but all info is welcome.

I'm using UT7 with QTR on a 2200 and have been using up a supply of ink I've had for a 
while.  I just changed a number of carts (LC, LM and M) and replaced them with a shipment 
I received a few weeks ago.  Here's the problem:  I'm not noticing a distinct reddish tone in 
the prints, something I've not seen before.  Is this something to do with the new base, and 
is it recommended to reprofile for the new base?

Ed