Digital BW, The Print

Some interesting 'unbiased' info ...
http://www.weink.com/ecom/support/technotes/tsn16.htm

additionally from the same site :

Use the appropriate type of ink. Epson printers use a micro-Piezo 
droplet formation printhead and need ink of specific surface tension 
and viscosity to allow proper droplet formation. using the wrong type 
of ink can produce poor quality prints due to poor replenishment 
rates, commonly seen as banding or drop-outs in your prints or poor 
color match.


Best,
Alex