Digital BW, The Print

>I have the Epson 2200 and read the B&H ad for Piezo inks that 
>I could change from the black Piezos back to color with issue. 
>Is this true? How about other ink manufacturers products?

It's the same with MIS.  The latest MIS inks are quite compatible with Epson
pigments and are made from the MIS color pigments inksets -- with the PK, LK
and LLK being the main inputs.

That said, there is residual color that'll stay in the head for quite some
time.  So, expect significant "pollution" of your printing as you switch
back and forth.  If at all possible, I'd recommend separate printers. 

Paul
www.PaulRoark.com