Digital BW, The Print

Martin Wesley wrote (under a different heading):
 
> > Generally most people in your position have wound up dedicating
> another
> > printer to B&W printing using one of the grayscale ink sets. The
> new Espon
> > 2200 might offer you a better path for a single printer but custom
> profiles
> > or software such as Image Print would still be desirable.

Pardon my ignorance, but what do you mean? I read other messages too,
suggesting this printer (in Europe it's called the 2100 AFAIK)  can have
both. Does it have the possibility of several gray / black inks AND
several color inks? I thought it was only black and gray, and color.
Confused, Ton Guiking