Digital BW, The Print

Hi Mark,
 
> You mention using LK as part of your Carbon-6 setup here, 
> but I didn't see LK mentioned in your Carbon-6 PDF. 

At page 3 of http://www.paulroark.com/BW-Info/Ink-Mixing.pdf in the 
Mixing Ratios section I note that the M position ink (16.7% Eboni) is 
also used for the LK position.  I probably ought to make it more 
clear.  

> On a related note, I was wondering why only 6 position in Carbon-6.
> Would adding a 7th position not make any practical difference on a
> 7-position printer like a 7600? 

At least if one is using the Epson driver, the k2 printers clearly 
must have all 7 positions appropriately filled.  The 16.7% M position 
ink is the appropriate density to work well with the Epson driver.  I 
don't think yet another density would have any impact on smoothness.  

For simplicity, I've limited my write-ups to one set of dilutions -- 
the same for the Epson driver and QTR.  That way one can try each 
workflow and see what works best.  I, in fact, find myself using the 
Epson driver with an ICC made with Create ICC-RGB.  But, if one wants 
to use QTR exclusively, there is obviously more flexibility as to 
what the LK position is used for.

> I was curious whether diluting Y 1 to 1 with base would 
> make prints any smoother - and using this dilution as #7.

I don't think you'd see any difference even with a loupe.  The 2.1% Y 
mix in a modern printer is extremely smooth.  Then again, give it a 
try and let us know.  If you're using QTR or other rip, it's easy 
enough to try it.


Paul  
www.PaulRoark.com