Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@y..., "Paul Roark" 
<paul.roark@v...> wrote:
 
I have been curious about that also.  Some other experts claim that 
the Epson 100% black is just that.  However, my suspicious are that 
most of the drivers do mix in a little color.  Some of the evidence I 
see is that the "black ink only" blacks are slightly darker, and I 
think there are slight differences in the depth of black depending on 
which tone curve is used for the MIS VM system.  This last 
observation (and I have not spent the time tosee what, if any, 
pattern there really is) might even indicate that the driver is 
taking adjacent colors into affect.
  
   Hey Paul. 
       Most desktop inkjet printers do this. They print a CMY 
composite if the black is going to be printed next next to a color. 
They do it to help control intercolor or interink mixing or "bleed". 
It helps to keep the black from getting all fuzzy and running into 
the colors. Why they would do it for black only I would guess that 
they are trying for a more nuetral black perhaps.

Jeff.