Digital BW, The Print

I'm having a problem with my color printing. The 1160 I run for B&W
work uses a Nomorecarts(!) CFS and MIS VM inks, and the combo has
functioned perfectly for well over two years now. It's the blacks in
my 1280 colour machine (Win2K SP3) that give trouble. A new batch of
Generations 4 inks loaded into what Jerry Olsen used to call the
"Cadillac" of CFS devices, the one sold by Inkjet Goodies, "dusts" the
black onto the white surround if the print's low values touch the edge
of the print area. Apparently the solvent in the new batch of black
ink does not dry the inks fast enough to synch with the 1280 heads'
rate of travel. It's a real PITA to try for an exchange from this
location in Canada (SShore of Nova Scotia), but I can't help but
wonder if some of you alchemists with experience in mixing inks can
suggest a solvent I might add or technique that might work here. I
hate to discard the expensive (and efficient) CFS, but absent a remedy
I'll have to go to MIS for a batch of their colour inks and a CFS.
Bob Bollini
campearwig@...