Digital BW, The Print

Philip,

> For most papers we only need about 3 or 4 inks/positions from UT7 
> so it is possible to use UT7 in 4 or 6 color Epson printers. 
> Is this correct?

No, UT7 needs the cyan and magenta hextone channels, in addition to the
black ink.  It has light and dark warm carbon and cool toner inks.  A 4-ink
printer only has 3 spots aside from the black.  The UT1 is the variable-tone
inkset that will work in a 4-ink ("quadtone") printer.  

> Also is it possible to buy only 3 inks if only use PhotoRag for warm or
> cold tone, and 5 inks for both? And keep other position with original
> Epson inks?

The yellow position is the only one that is really optional and open.  If
you are using a rip, you can also do without the LK.  

With the Epson driver, you probably could put almost anything in the Y spot.
To turn on the black ink with the Epson driver that ink does need to be
"full-on" in the curves set at 100%.  While the black ink is substituted for
all the midtones at that point, there is a slight risk that too high a gamut
ink in the Y position would affect the tone of the image in the deep
shadows.

You can buy the inks in bulk or by the individual cartridge.
 
>   MIS said EZN has only two different inks.

The EZ midtone inks are neutral or warm.  That's it.  They both have the
same density.

> How about UT7? All seven are different inks?

Yes.

Paul
www.PaulRoark.com